<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:37d36143-b8d9-4f8d-8d64-b471075ea485,g:b963c52a-52e5-45c2-a3a9-739bf07cec78-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/Coverpage" xlink:type="simple" xlink:href="din-20201231.xsd#Coverpage"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/Coverpage" xlink:type="extended" id="ib3397ec759aa41c5a68aead2f54e1404_Coverpage"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="din-20201231.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedBalanceSheets" xlink:type="extended" id="i6dfbe3cf478d44d9be28b1bf8202c667_ConsolidatedBalanceSheets"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedBalanceSheetsParentheticals" xlink:type="simple" xlink:href="din-20201231.xsd#ConsolidatedBalanceSheetsParentheticals"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedBalanceSheetsParentheticals" xlink:type="extended" id="i1abd33423c56414d8e3218edc6bc6252_ConsolidatedBalanceSheetsParentheticals"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedStatementsofComprehensiveLossIncome" xlink:type="simple" xlink:href="din-20201231.xsd#ConsolidatedStatementsofComprehensiveLossIncome"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedStatementsofComprehensiveLossIncome" xlink:type="extended" id="i586503490c1d4daa9490fb3e636a7805_ConsolidatedStatementsofComprehensiveLossIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_b7162306-1312-4113-8186-017e76a48984" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_RevenuesAbstract_b7162306-1312-4113-8186-017e76a48984" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8db823c8-1f07-454c-afa1-d176fbd0ae0c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_b7162306-1312-4113-8186-017e76a48984" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8db823c8-1f07-454c-afa1-d176fbd0ae0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalIncome_3d1e135c-c3ae-4eb2-8c73-687e5cbb055f" xlink:href="din-20201231.xsd#din_RentalIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_b7162306-1312-4113-8186-017e76a48984" xlink:to="loc_din_RentalIncome_3d1e135c-c3ae-4eb2-8c73-687e5cbb055f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_d282d39a-ac1b-410d-8228-992294fd61da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_b7162306-1312-4113-8186-017e76a48984" xlink:to="loc_us-gaap_Revenues_d282d39a-ac1b-410d-8228-992294fd61da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_a4093214-ff8b-48b2-b7b0-7e152f0b0ea5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_a4093214-ff8b-48b2-b7b0-7e152f0b0ea5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_46cf0829-f06f-44cb-a933-79d7fe279f83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_46cf0829-f06f-44cb-a933-79d7fe279f83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalFinanceLeaseInterestExpense_115b30a0-c60a-4122-9fac-52a9f071e92e" xlink:href="din-20201231.xsd#din_RentalFinanceLeaseInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_din_RentalFinanceLeaseInterestExpense_115b30a0-c60a-4122-9fac-52a9f071e92e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalExpensesOther_c924e99a-f82f-4de9-9ae4-5ff5633407b4" xlink:href="din-20201231.xsd#din_RentalExpensesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_din_RentalExpensesOther_c924e99a-f82f-4de9-9ae4-5ff5633407b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalExpenses_3bd40698-ab2a-4bf5-81f5-c317045fb9eb" xlink:href="din-20201231.xsd#din_RentalExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_din_RentalExpenses_3bd40698-ab2a-4bf5-81f5-c317045fb9eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingInterestExpense_32c0b150-8fa2-4d2f-9242-0ad870650790" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_us-gaap_FinancingInterestExpense_32c0b150-8fa2-4d2f-9242-0ad870650790" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_6afe91f2-de14-476d-83be-4babc5882eda" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_2813f007-15f7-4ceb-b278-954f97ee38e5" xlink:to="loc_us-gaap_CostOfRevenue_6afe91f2-de14-476d-83be-4babc5882eda" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_86cd52cc-e614-4279-bc4b-ddf5ebab4110" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_GrossProfit_86cd52cc-e614-4279-bc4b-ddf5ebab4110" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_b6c31b5d-4832-4ba6-be45-c570e43130dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_b6c31b5d-4832-4ba6-be45-c570e43130dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetImpairmentCharges_048d9821-9b52-444c-8ce4-4528e6189d3d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_OtherAssetImpairmentCharges_048d9821-9b52-444c-8ce4-4528e6189d3d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_7e46f7ac-12ae-4a59-a67a-43ba120af4bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_InterestExpenseDebt_7e46f7ac-12ae-4a59-a67a-43ba120af4bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_160308c2-5dec-4626-8f56-f93587b09028" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_160308c2-5dec-4626-8f56-f93587b09028" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ef6cee72-c169-4212-b143-cd43490a042b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ef6cee72-c169-4212-b143-cd43490a042b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnRestructuringOfDebt_9e120257-4e6b-4f4b-9358-16a576f14437" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnRestructuringOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_GainsLossesOnRestructuringOfDebt_9e120257-4e6b-4f4b-9358-16a576f14437" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_ba205bc2-165f-48d7-a54e-b2d5f8be7720" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_ba205bc2-165f-48d7-a54e-b2d5f8be7720" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_da9fbfb4-6ddb-4940-9ef1-128b68a349b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_da9fbfb4-6ddb-4940-9ef1-128b68a349b8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9e201c50-fdad-4e70-809a-798fc899ff64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9e201c50-fdad-4e70-809a-798fc899ff64" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_26c45cd7-32f2-4af7-8679-2b711891652b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_NetIncomeLoss_26c45cd7-32f2-4af7-8679-2b711891652b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_b9489af2-bfee-4c67-a3a7-b74a5e3ee4d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_b9489af2-bfee-4c67-a3a7-b74a5e3ee4d4" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_21828ad7-bb2d-4a32-b95a-494a3944bcee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_b9489af2-bfee-4c67-a3a7-b74a5e3ee4d4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_21828ad7-bb2d-4a32-b95a-494a3944bcee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_c1aec664-0ed5-4ae0-b76f-71189f193263" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_b9489af2-bfee-4c67-a3a7-b74a5e3ee4d4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_c1aec664-0ed5-4ae0-b76f-71189f193263" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_b789e9af-2585-4315-b3dc-81e2e29fe8b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_b9489af2-bfee-4c67-a3a7-b74a5e3ee4d4" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_b789e9af-2585-4315-b3dc-81e2e29fe8b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_70b01cf9-4bed-47b0-8d96-5f74dc1c4ab3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_70b01cf9-4bed-47b0-8d96-5f74dc1c4ab3" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_244ff5c0-942b-4a5d-9d33-0e14192ce459" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_033724c9-f18c-428f-b6eb-ce5dedc74f11" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_70b01cf9-4bed-47b0-8d96-5f74dc1c4ab3" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_033724c9-f18c-428f-b6eb-ce5dedc74f11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_6463e194-0de8-48fe-9f90-fd9a71910473" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_70b01cf9-4bed-47b0-8d96-5f74dc1c4ab3" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_6463e194-0de8-48fe-9f90-fd9a71910473" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_6ebe03db-9bc1-4876-92cd-6a1edccd4a4f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_EarningsPerShareAbstract_6ebe03db-9bc1-4876-92cd-6a1edccd4a4f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_955c793d-8c6c-42fe-9eea-e9a8fae77db4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_6ebe03db-9bc1-4876-92cd-6a1edccd4a4f" xlink:to="loc_us-gaap_EarningsPerShareBasic_955c793d-8c6c-42fe-9eea-e9a8fae77db4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_5043d880-3294-4f7e-b0fe-7d83f6d6f001" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_6ebe03db-9bc1-4876-92cd-6a1edccd4a4f" xlink:to="loc_us-gaap_EarningsPerShareDiluted_5043d880-3294-4f7e-b0fe-7d83f6d6f001" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_924ae432-9135-45ad-8cce-5bacf0a79d12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_924ae432-9135-45ad-8cce-5bacf0a79d12" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_e9474e94-29df-43c0-b906-17bcdc8181ab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_924ae432-9135-45ad-8cce-5bacf0a79d12" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_e9474e94-29df-43c0-b906-17bcdc8181ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_260aa01c-c7c4-470e-8410-4a499cc4d35f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_924ae432-9135-45ad-8cce-5bacf0a79d12" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_260aa01c-c7c4-470e-8410-4a499cc4d35f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_2148e5ec-eeb2-48cc-bda3-cf9ca32230da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_28399383-9ed0-4420-ac39-60e0d04311de" xlink:to="loc_us-gaap_StatementTable_2148e5ec-eeb2-48cc-bda3-cf9ca32230da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_74f9aba5-bdb7-46db-9289-f03f70329634" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_2148e5ec-eeb2-48cc-bda3-cf9ca32230da" xlink:to="loc_srt_ProductOrServiceAxis_74f9aba5-bdb7-46db-9289-f03f70329634" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_74f9aba5-bdb7-46db-9289-f03f70329634_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_74f9aba5-bdb7-46db-9289-f03f70329634" xlink:to="loc_srt_ProductsAndServicesDomain_74f9aba5-bdb7-46db-9289-f03f70329634_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_74f9aba5-bdb7-46db-9289-f03f70329634" xlink:to="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_2fb4dcf8-dbc4-422f-a4e2-e886e96dd2a2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_us-gaap_FranchisorMember_2fb4dcf8-dbc4-422f-a4e2-e886e96dd2a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisorRoyaltiesfranchisefeesandotherMember_fcc2ab5d-2148-4fd4-969b-e05ade7b6ce2" xlink:href="din-20201231.xsd#din_FranchisorRoyaltiesfranchisefeesandotherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_2fb4dcf8-dbc4-422f-a4e2-e886e96dd2a2" xlink:to="loc_din_FranchisorRoyaltiesfranchisefeesandotherMember_fcc2ab5d-2148-4fd4-969b-e05ade7b6ce2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisorAdvertisingRevenueMember_ee6402ce-ce47-4514-9a0b-6477d359531d" xlink:href="din-20201231.xsd#din_FranchisorAdvertisingRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_2fb4dcf8-dbc4-422f-a4e2-e886e96dd2a2" xlink:to="loc_din_FranchisorAdvertisingRevenueMember_ee6402ce-ce47-4514-9a0b-6477d359531d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CompanyRestaurantSalesMember_8c419f71-8207-4193-91a4-60e0ad62f730" xlink:href="din-20201231.xsd#din_CompanyRestaurantSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_din_CompanyRestaurantSalesMember_8c419f71-8207-4193-91a4-60e0ad62f730" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServiceMember_8a6e39cd-1bf3-4001-bfca-e66bfbbe439a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_us-gaap_FinancialServiceMember_8a6e39cd-1bf3-4001-bfca-e66bfbbe439a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_1c0bcbf7-f803-40d1-bab4-d6faa19f5f97" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdvertisingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_us-gaap_AdvertisingMember_1c0bcbf7-f803-40d1-bab4-d6faa19f5f97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_BadDebtMember_383d7e8a-eddb-4a48-888c-560832a7ed39" xlink:href="din-20201231.xsd#din_BadDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_din_BadDebtMember_383d7e8a-eddb-4a48-888c-560832a7ed39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseMember_8edab2c1-7695-4769-8e23-0eed293bb7b5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchiseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cc389c1d-b424-4048-bf4d-a721d7419364" xlink:to="loc_us-gaap_FranchiseMember_8edab2c1-7695-4769-8e23-0eed293bb7b5" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedStatementsofStockholdersDeficit" xlink:type="simple" xlink:href="din-20201231.xsd#ConsolidatedStatementsofStockholdersDeficit"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedStatementsofStockholdersDeficit" xlink:type="extended" id="i3deef964ca23433da2d20740ed1956a1_ConsolidatedStatementsofStockholdersDeficit">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_22e8b796-e319-44eb-859a-29b3af322e34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_22e8b796-e319-44eb-859a-29b3af322e34" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_2c14747c-412c-420c-b6dc-2c8143e422be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_2c14747c-412c-420c-b6dc-2c8143e422be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_456eb357-2ff3-408e-8136-b141a491450d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockholdersEquity_456eb357-2ff3-408e-8136-b141a491450d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_caec1097-17e7-4333-b7c1-d1af414b0307" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_TreasuryStockShares_caec1097-17e7-4333-b7c1-d1af414b0307" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList_9e4ea243-8af5-44d0-9cc6-a6ad1f5ec4d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_AccountingStandardsUpdateExtensibleList_9e4ea243-8af5-44d0-9cc6-a6ad1f5ec4d6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_95e29fa5-fbe6-4a14-962b-c3711cbe0b52" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_NetIncomeLoss_95e29fa5-fbe6-4a14-962b-c3711cbe0b52" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a050c41b-a7a3-4ddb-a3e3-28d7760ef11f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a050c41b-a7a3-4ddb-a3e3-28d7760ef11f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_0d8014e0-ae7f-4dae-abb9-0fe9761d5efb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_0d8014e0-ae7f-4dae-abb9-0fe9761d5efb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_2ac1bb13-d1c4-479a-b487-7ed141dfc0b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_2ac1bb13-d1c4-479a-b487-7ed141dfc0b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_99047892-f077-490d-8500-75782ce84e59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_99047892-f077-490d-8500-75782ce84e59" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_b6ff583c-dd7a-478a-b09a-37651bf30679" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_b6ff583c-dd7a-478a-b09a-37651bf30679" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_0f700f04-1168-48b5-a062-77ed35732e4b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_0f700f04-1168-48b5-a062-77ed35732e4b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockRepurchasedDuringPeriodShares_186558d9-6cea-42b6-b0b7-f4c17c569cff" xlink:href="din-20201231.xsd#din_RestrictedStockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_din_RestrictedStockRepurchasedDuringPeriodShares_186558d9-6cea-42b6-b0b7-f4c17c569cff" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockRepurchasedDuringPeriodValue_4c9822f5-52a5-4eb6-924c-3024b9ca5d57" xlink:href="din-20201231.xsd#din_RestrictedStockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_din_RestrictedStockRepurchasedDuringPeriodValue_4c9822f5-52a5-4eb6-924c-3024b9ca5d57" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_09c69d00-ee1e-4096-ae64-ad22653bb087" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_09c69d00-ee1e-4096-ae64-ad22653bb087" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_cf563e40-03b3-494b-b492-a65d5d62fcaa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_cf563e40-03b3-494b-b492-a65d5d62fcaa" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_1b5a0364-2da2-496e-9f6c-27ef44f0bcd6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_DividendsCommonStock_1b5a0364-2da2-496e-9f6c-27ef44f0bcd6" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_b9317327-018a-4db4-8766-4d29be37705f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_31991e20-1b31-4eff-8314-42a65b6d5bd5" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_b9317327-018a-4db4-8766-4d29be37705f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_fb4cfdc9-db8d-44f3-b01c-781c20100208" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_808a0040-3dd8-4723-bfc5-b2c548b7afef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_e01a114b-4766-4fd4-8965-ffff30eadd9d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_203276a4-7542-4141-9635-c26426af27d9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_22e8b796-e319-44eb-859a-29b3af322e34" xlink:to="loc_us-gaap_StatementTable_203276a4-7542-4141-9635-c26426af27d9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_0c496740-133a-4eac-9911-62f1e140eaed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_203276a4-7542-4141-9635-c26426af27d9" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_0c496740-133a-4eac-9911-62f1e140eaed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_0c496740-133a-4eac-9911-62f1e140eaed_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_0c496740-133a-4eac-9911-62f1e140eaed" xlink:to="loc_us-gaap_EquityComponentDomain_0c496740-133a-4eac-9911-62f1e140eaed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_0c496740-133a-4eac-9911-62f1e140eaed" xlink:to="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_45b8a238-73ad-4742-89da-621217a24456" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:to="loc_us-gaap_CommonStockMember_45b8a238-73ad-4742-89da-621217a24456" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_d7335d2a-e0b7-4300-a0d6-7af70b0a55c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_d7335d2a-e0b7-4300-a0d6-7af70b0a55c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_2d4cf295-aebe-4124-8ef0-77e50b44e692" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:to="loc_us-gaap_RetainedEarningsMember_2d4cf295-aebe-4124-8ef0-77e50b44e692" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ca6fc679-3f2c-4c8d-8e63-c6b47a3b0902" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ca6fc679-3f2c-4c8d-8e63-c6b47a3b0902" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_bdb0176c-f0de-47b7-bcc3-e66bfbdb02f5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_df4d6c81-415b-4feb-8ab2-6a2c209fa30e" xlink:to="loc_us-gaap_TreasuryStockMember_bdb0176c-f0de-47b7-bcc3-e66bfbdb02f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_de273726-d26a-4f43-ae4f-164c64a03f9a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_203276a4-7542-4141-9635-c26426af27d9" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_de273726-d26a-4f43-ae4f-164c64a03f9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_de273726-d26a-4f43-ae4f-164c64a03f9a_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_de273726-d26a-4f43-ae4f-164c64a03f9a" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_de273726-d26a-4f43-ae4f-164c64a03f9a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_7016799a-4fa4-4251-b7ed-3bf85edc2251" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_de273726-d26a-4f43-ae4f-164c64a03f9a" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_7016799a-4fa4-4251-b7ed-3bf85edc2251" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_13862e08-e693-4b60-98df-c69a547955e6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_7016799a-4fa4-4251-b7ed-3bf85edc2251" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_13862e08-e693-4b60-98df-c69a547955e6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="din-20201231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended" id="i7d344e706dff49528650c1a44ed6df8d_ConsolidatedStatementsofCashFlows"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/TheCompany" xlink:type="simple" xlink:href="din-20201231.xsd#TheCompany"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/TheCompany" xlink:type="extended" id="i2c82261254da42b3bf64208a9be185ea_TheCompany"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/TheCompanyDetails" xlink:type="simple" xlink:href="din-20201231.xsd#TheCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/TheCompanyDetails" xlink:type="extended" id="i960fc97ffa564f18b797e5008b715273_TheCompanyDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantConcepts_5b911743-6326-4c47-9553-811f6e47bc91" xlink:href="din-20201231.xsd#din_NumberOfRestaurantConcepts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_din_NumberOfRestaurantConcepts_5b911743-6326-4c47-9553-811f6e47bc91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_698e6924-ab90-448e-87b5-c234f92638d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_us-gaap_NumberOfRestaurants_698e6924-ab90-448e-87b5-c234f92638d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_a8404ca9-ee4b-45f3-941a-5c6d055ae616" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_a8404ca9-ee4b-45f3-941a-5c6d055ae616" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfTerritoriesInWhichEntityOperates_7318a1e1-f06d-4282-99e2-57a3cf630257" xlink:href="din-20201231.xsd#din_NumberOfTerritoriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_din_NumberOfTerritoriesInWhichEntityOperates_7318a1e1-f06d-4282-99e2-57a3cf630257" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_649aa0cf-8a88-4073-aa5d-c994b02924fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfCountriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_649aa0cf-8a88-4073-aa5d-c994b02924fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_a783cf18-c75a-4467-a69f-ea529dbf9b84" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFranchisorDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_3d8605ad-6a80-42e7-a2e1-720c16df951f" xlink:to="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_a783cf18-c75a-4467-a69f-ea529dbf9b84" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6241e9f8-2a99-4805-8a15-06881164d387" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_a783cf18-c75a-4467-a69f-ea529dbf9b84" xlink:to="loc_dei_LegalEntityAxis_6241e9f8-2a99-4805-8a15-06881164d387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6241e9f8-2a99-4805-8a15-06881164d387_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6241e9f8-2a99-4805-8a15-06881164d387" xlink:to="loc_dei_EntityDomain_6241e9f8-2a99-4805-8a15-06881164d387_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f7eb6fdc-1285-40d0-95f5-a63302476784" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6241e9f8-2a99-4805-8a15-06881164d387" xlink:to="loc_dei_EntityDomain_f7eb6fdc-1285-40d0-95f5-a63302476784" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_2a5f5cc6-4292-44e3-9219-74cc755f0285" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_f7eb6fdc-1285-40d0-95f5-a63302476784" xlink:to="loc_din_IhopMember_2a5f5cc6-4292-44e3-9219-74cc755f0285" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_67fdfc92-8c7b-44cc-bf98-cd8fcf206714" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_f7eb6fdc-1285-40d0-95f5-a63302476784" xlink:to="loc_din_ApplebeesMember_67fdfc92-8c7b-44cc-bf98-cd8fcf206714" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_b7bf7216-1634-4d56-bc27-26cd73f3181f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_a783cf18-c75a-4467-a69f-ea529dbf9b84" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_b7bf7216-1634-4d56-bc27-26cd73f3181f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_b7bf7216-1634-4d56-bc27-26cd73f3181f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_b7bf7216-1634-4d56-bc27-26cd73f3181f" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_b7bf7216-1634-4d56-bc27-26cd73f3181f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_a79b4190-01b7-4670-b3df-7564013c634b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_b7bf7216-1634-4d56-bc27-26cd73f3181f" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_a79b4190-01b7-4670-b3df-7564013c634b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_5d0da93a-e959-45ae-adb0-cf0217d2ee3f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_a79b4190-01b7-4670-b3df-7564013c634b" xlink:to="loc_us-gaap_FranchisedUnitsMember_5d0da93a-e959-45ae-adb0-cf0217d2ee3f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicensingAgreementsMember_e52d9d80-91ac-4597-b3e7-19b09023c7a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_a79b4190-01b7-4670-b3df-7564013c634b" xlink:to="loc_us-gaap_LicensingAgreementsMember_e52d9d80-91ac-4597-b3e7-19b09023c7a9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="extended" id="i714d1716b40a414c8fdfced469e3828d_BasisofPresentationandSummaryofSignificantAccountingPolicies"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended" id="ibf3065d8485b4cd3a95ddbd8cb6f68fe_BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesTables" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesTables" xlink:type="extended" id="i90061b45b1584f4a935288413b65141c_BasisofPresentationandSummaryofSignificantAccountingPoliciesTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended" id="i20e0505204084126879a3666c199ba78_BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_dac67b7e-2991-4b70-a18a-8a01f38b75ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_dac67b7e-2991-4b70-a18a-8a01f38b75ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e8d5e47e-b3a7-4458-a80d-673077f46604" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_e8d5e47e-b3a7-4458-a80d-673077f46604" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InterestReserveForSecuredDebt_b69b0b6c-59be-4dc6-8431-cd057bd3e44b" xlink:href="din-20201231.xsd#din_InterestReserveForSecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_din_InterestReserveForSecuredDebt_b69b0b6c-59be-4dc6-8431-cd057bd3e44b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfFranchisees_98d90bd3-61ef-4f4b-bf16-cdd7c4bc84d5" xlink:href="din-20201231.xsd#din_NumberOfFranchisees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_din_NumberOfFranchisees_98d90bd3-61ef-4f4b-bf16-cdd7c4bc84d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_09ffe2c4-667d-47eb-854f-245e5bc374b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_NumberOfRestaurants_09ffe2c4-667d-47eb-854f-245e5bc374b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_d01c3ccb-aae7-4785-9820-aff756765b3d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_d01c3ccb-aae7-4785-9820-aff756765b3d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_61805f63-76ae-410f-940c-179f8926d025" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_AccountsReceivableNet_61805f63-76ae-410f-940c-179f8926d025" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_c3679f90-6516-4a77-b5a5-0e48412b94a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_c3679f90-6516-4a77-b5a5-0e48412b94a5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_bb26c807-07b9-47a4-9cfd-59c45b8ccc29" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_bb26c807-07b9-47a4-9cfd-59c45b8ccc29" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportingUnits_53de17d8-4e6a-4b99-9561-f6a1590d1f20" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportingUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_NumberOfReportingUnits_53de17d8-4e6a-4b99-9561-f6a1590d1f20" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberofRevenueOperations_992af0c5-0399-4a4d-a1df-0fa6db963bea" xlink:href="din-20201231.xsd#din_NumberofRevenueOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_din_NumberofRevenueOperations_992af0c5-0399-4a4d-a1df-0fa6db963bea" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_215d241e-d447-40be-ae16-810af3b637dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_215d241e-d447-40be-ae16-810af3b637dd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_d6aaa075-67db-4fac-9375-3f3c984cc391" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_AdvertisingExpense_d6aaa075-67db-4fac-9375-3f3c984cc391" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_626a8398-9a79-40d3-be9b-d82b15a03a66" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_NumberOfOperatingSegments_626a8398-9a79-40d3-be9b-d82b15a03a66" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_0aec6ae4-c571-4a9e-9c08-4d90f45fffc5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_NumberOfReportableSegments_0aec6ae4-c571-4a9e-9c08-4d90f45fffc5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfTerritoriesInWhichEntityOperates_4565ae71-c258-4c8e-aa67-1f71eb9ff653" xlink:href="din-20201231.xsd#din_NumberOfTerritoriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_din_NumberOfTerritoriesInWhichEntityOperates_4565ae71-c258-4c8e-aa67-1f71eb9ff653" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_0306e31c-937e-4106-8356-b40753196364" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfCountriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_NumberOfCountriesInWhichEntityOperates_0306e31c-937e-4106-8356-b40753196364" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_fd98bb02-a41e-4114-9c2b-01bc052a6d9e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_fd98bb02-a41e-4114-9c2b-01bc052a6d9e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a139c40f-f584-4ad3-ab2e-fee90c6c1f1c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_StockholdersEquity_a139c40f-f584-4ad3-ab2e-fee90c6c1f1c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ae02754b-d373-4a1f-a1ee-ba869f48166f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_ae02754b-d373-4a1f-a1ee-ba869f48166f" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_ec9954c5-d70d-4023-b9e1-5439997e9e0f" xlink:to="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_b53765ff-bd81-45d8-9ca5-00f687c38c5e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_srt_ProductOrServiceAxis_b53765ff-bd81-45d8-9ca5-00f687c38c5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b53765ff-bd81-45d8-9ca5-00f687c38c5e_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_b53765ff-bd81-45d8-9ca5-00f687c38c5e" xlink:to="loc_srt_ProductsAndServicesDomain_b53765ff-bd81-45d8-9ca5-00f687c38c5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_fa2cb7fe-2e16-43fd-b236-c661cc99ca57" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_b53765ff-bd81-45d8-9ca5-00f687c38c5e" xlink:to="loc_srt_ProductsAndServicesDomain_fa2cb7fe-2e16-43fd-b236-c661cc99ca57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisorAdvertisingRevenueMember_9a3407aa-a52a-4abe-b9a9-3580832651fb" xlink:href="din-20201231.xsd#din_FranchisorAdvertisingRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fa2cb7fe-2e16-43fd-b236-c661cc99ca57" xlink:to="loc_din_FranchisorAdvertisingRevenueMember_9a3407aa-a52a-4abe-b9a9-3580832651fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_8240c5d6-f979-4bc0-a5bc-d1b36569bf79" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_8240c5d6-f979-4bc0-a5bc-d1b36569bf79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_8240c5d6-f979-4bc0-a5bc-d1b36569bf79_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_8240c5d6-f979-4bc0-a5bc-d1b36569bf79" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_8240c5d6-f979-4bc0-a5bc-d1b36569bf79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_6fd1d4f2-6c19-4e49-81b2-617f47e29be4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_8240c5d6-f979-4bc0-a5bc-d1b36569bf79" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_6fd1d4f2-6c19-4e49-81b2-617f47e29be4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromRightsConcentrationRiskMember_3fc450be-ce14-4b4c-b87b-6fb9cf7a3c33" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromRightsConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_6fd1d4f2-6c19-4e49-81b2-617f47e29be4" xlink:to="loc_us-gaap_RevenueFromRightsConcentrationRiskMember_3fc450be-ce14-4b4c-b87b-6fb9cf7a3c33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_cf9b942b-b058-4258-ae03-a3ad9c9ed352" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_9f7d6c01-6def-4c76-ac23-b2cf35c7bcee" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_cf9b942b-b058-4258-ae03-a3ad9c9ed352" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_3f5e2219-0551-45ae-9d11-c4eb27a2ddcc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_cf9b942b-b058-4258-ae03-a3ad9c9ed352" xlink:to="loc_us-gaap_SalesRevenueNetMember_3f5e2219-0551-45ae-9d11-c4eb27a2ddcc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_c4d79476-c2e1-418c-8574-aadfea9614e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_cf9b942b-b058-4258-ae03-a3ad9c9ed352" xlink:to="loc_us-gaap_AccountsReceivableMember_c4d79476-c2e1-418c-8574-aadfea9614e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_7bb765bf-d86e-4418-b44b-8ac698e4e9ea" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_7bb765bf-d86e-4418-b44b-8ac698e4e9ea" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_7bb765bf-d86e-4418-b44b-8ac698e4e9ea_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_7bb765bf-d86e-4418-b44b-8ac698e4e9ea" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_7bb765bf-d86e-4418-b44b-8ac698e4e9ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_7bb765bf-d86e-4418-b44b-8ac698e4e9ea" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LargestFranchiseesMember_da3ead09-1ab3-43e8-a9d7-dce90a57c962" xlink:href="din-20201231.xsd#din_LargestFranchiseesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:to="loc_din_LargestFranchiseesMember_da3ead09-1ab3-43e8-a9d7-dce90a57c962" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_dc448d55-9ea9-4cd4-9da9-8f51f46b7263" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:to="loc_us-gaap_FranchisedUnitsMember_dc448d55-9ea9-4cd4-9da9-8f51f46b7263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisedUnitsOrLicensingAgreementsMember_fade5526-3383-40bb-9f59-1258248cc78b" xlink:href="din-20201231.xsd#din_FranchisedUnitsOrLicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:to="loc_din_FranchisedUnitsOrLicensingAgreementsMember_fade5526-3383-40bb-9f59-1258248cc78b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_f0a160a4-af5a-4000-a3a1-d823ec398bd3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_899f8b36-44b7-4fb7-9a08-8148ca27cbb9" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_f0a160a4-af5a-4000-a3a1-d823ec398bd3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_adca6f29-9d82-4b30-ad28-165b60b16c7b" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_dei_LegalEntityAxis_adca6f29-9d82-4b30-ad28-165b60b16c7b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_adca6f29-9d82-4b30-ad28-165b60b16c7b_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_adca6f29-9d82-4b30-ad28-165b60b16c7b" xlink:to="loc_dei_EntityDomain_adca6f29-9d82-4b30-ad28-165b60b16c7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8a3d7ccf-11d9-496c-b08b-8d434197c56b" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_adca6f29-9d82-4b30-ad28-165b60b16c7b" xlink:to="loc_dei_EntityDomain_8a3d7ccf-11d9-496c-b08b-8d434197c56b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_8bdfe7af-957d-4c6b-97e6-8c5e09da8b3a" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8a3d7ccf-11d9-496c-b08b-8d434197c56b" xlink:to="loc_din_ApplebeesMember_8bdfe7af-957d-4c6b-97e6-8c5e09da8b3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_2d5e7082-95fc-41ea-88f3-b56c86adac6e" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8a3d7ccf-11d9-496c-b08b-8d434197c56b" xlink:to="loc_din_IhopMember_2d5e7082-95fc-41ea-88f3-b56c86adac6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_7bf0b29c-e48e-40ed-a520-7a54d36e84c7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_7bf0b29c-e48e-40ed-a520-7a54d36e84c7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7bf0b29c-e48e-40ed-a520-7a54d36e84c7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_7bf0b29c-e48e-40ed-a520-7a54d36e84c7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7bf0b29c-e48e-40ed-a520-7a54d36e84c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_7bf0b29c-e48e-40ed-a520-7a54d36e84c7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_72e5be89-7264-4409-8558-5ac52d64cf10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_72e5be89-7264-4409-8558-5ac52d64cf10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_83271a6f-41ba-4ac2-bf4d-fd574eb87306" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:to="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_83271a6f-41ba-4ac2-bf4d-fd574eb87306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentAndFixturesMember_067d0d96-294e-4bac-9841-2249fc53dbd4" xlink:href="din-20201231.xsd#din_EquipmentAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:to="loc_din_EquipmentAndFixturesMember_067d0d96-294e-4bac-9841-2249fc53dbd4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InternalUseSoftwareMember_d634c1e5-6072-4535-94a8-94f79f623d75" xlink:href="din-20201231.xsd#din_InternalUseSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_16067cee-e55a-4b5c-a73e-484bbd5ca9df" xlink:to="loc_din_InternalUseSoftwareMember_d634c1e5-6072-4535-94a8-94f79f623d75" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_60eb538a-1dd4-482c-a4c0-9f62d0491ec6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_60eb538a-1dd4-482c-a4c0-9f62d0491ec6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_60eb538a-1dd4-482c-a4c0-9f62d0491ec6_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_60eb538a-1dd4-482c-a4c0-9f62d0491ec6" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_60eb538a-1dd4-482c-a4c0-9f62d0491ec6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e9a2e475-3870-490c-810c-0b61974d1900" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_60eb538a-1dd4-482c-a4c0-9f62d0491ec6" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e9a2e475-3870-490c-810c-0b61974d1900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_6b93fae8-7a29-4e44-9fb2-b1ba386cfb84" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e9a2e475-3870-490c-810c-0b61974d1900" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_6b93fae8-7a29-4e44-9fb2-b1ba386cfb84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e7711970-d5d9-43ae-ab68-812da1f71365" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e7711970-d5d9-43ae-ab68-812da1f71365" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e7711970-d5d9-43ae-ab68-812da1f71365_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e7711970-d5d9-43ae-ab68-812da1f71365" xlink:to="loc_us-gaap_EquityComponentDomain_e7711970-d5d9-43ae-ab68-812da1f71365_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a4b7569c-0e8e-4ace-b559-1ac1aa9a70e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e7711970-d5d9-43ae-ab68-812da1f71365" xlink:to="loc_us-gaap_EquityComponentDomain_a4b7569c-0e8e-4ace-b559-1ac1aa9a70e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_a5b04d5d-33a6-4ffb-ba90-2dcaf3fb2c83" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a4b7569c-0e8e-4ace-b559-1ac1aa9a70e1" xlink:to="loc_us-gaap_RetainedEarningsMember_a5b04d5d-33a6-4ffb-ba90-2dcaf3fb2c83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_srt_RangeAxis_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581" xlink:to="loc_srt_RangeMember_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_3dda0a85-ecaf-4a5c-8a3b-176223bb2a4c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_ac5fdfc9-9c0f-4e40-a204-7cb57ef87581" xlink:to="loc_srt_RangeMember_3dda0a85-ecaf-4a5c-8a3b-176223bb2a4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_09970e9d-501d-4dd8-a645-2d791058c5a9" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3dda0a85-ecaf-4a5c-8a3b-176223bb2a4c" xlink:to="loc_srt_MinimumMember_09970e9d-501d-4dd8-a645-2d791058c5a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_acfca256-3840-4b12-9a70-aa52542fc67a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_3dda0a85-ecaf-4a5c-8a3b-176223bb2a4c" xlink:to="loc_srt_MaximumMember_acfca256-3840-4b12-9a70-aa52542fc67a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_e1df0f9d-6104-402a-95ab-dae0fadaa876" xlink:to="loc_us-gaap_CreditFacilityAxis_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b" xlink:to="loc_us-gaap_CreditFacilityDomain_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_e4fff981-66c8-409e-8b27-ceffb69a129e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_e8fafd5f-5b03-40ac-babf-b1ec2e25f36b" xlink:to="loc_us-gaap_CreditFacilityDomain_e4fff981-66c8-409e-8b27-ceffb69a129e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_b5dc007b-496e-40bf-bd5d-9f4c3a611bb3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_e4fff981-66c8-409e-8b27-ceffb69a129e" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_b5dc007b-496e-40bf-bd5d-9f4c3a611bb3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails" xlink:type="extended" id="i4c91f17534a74211a4bd779dfd54756b_BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_2694b5ea-38b8-42f9-a946-92b4d0edd43d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e37aa600-ab84-4350-8ba4-f8c44f2e65ff" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_2694b5ea-38b8-42f9-a946-92b4d0edd43d" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e37aa600-ab84-4350-8ba4-f8c44f2e65ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_2033d7b1-9544-4c3a-9c80-83f98fe8ab34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_2694b5ea-38b8-42f9-a946-92b4d0edd43d" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_2033d7b1-9544-4c3a-9c80-83f98fe8ab34" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_bac0732c-3327-472d-804a-d7acc07efd66" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_2033d7b1-9544-4c3a-9c80-83f98fe8ab34" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_bac0732c-3327-472d-804a-d7acc07efd66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bac0732c-3327-472d-804a-d7acc07efd66_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_bac0732c-3327-472d-804a-d7acc07efd66" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_bac0732c-3327-472d-804a-d7acc07efd66_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_614d3c7e-4ff6-448c-a25c-5029e39722db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_bac0732c-3327-472d-804a-d7acc07efd66" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_614d3c7e-4ff6-448c-a25c-5029e39722db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_7008043e-cf96-4615-a809-3694c5318b8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_614d3c7e-4ff6-448c-a25c-5029e39722db" xlink:to="loc_us-gaap_MoneyMarketFundsMember_7008043e-cf96-4615-a809-3694c5318b8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PrepaidAdvertisingandGiftCardsMember_81b07d0e-ff2c-4212-9c9d-41e72a99d8a6" xlink:href="din-20201231.xsd#din_PrepaidAdvertisingandGiftCardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_614d3c7e-4ff6-448c-a25c-5029e39722db" xlink:to="loc_din_PrepaidAdvertisingandGiftCardsMember_81b07d0e-ff2c-4212-9c9d-41e72a99d8a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherDepositoryAccountsMember_fba70c18-703d-46ea-97b2-d348948a2070" xlink:href="din-20201231.xsd#din_OtherDepositoryAccountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_614d3c7e-4ff6-448c-a25c-5029e39722db" xlink:to="loc_din_OtherDepositoryAccountsMember_fba70c18-703d-46ea-97b2-d348948a2070" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails" xlink:type="extended" id="ieb39961f995c424a837419e9c712c05c_BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_eb6fbd68-d051-4ebd-b4ae-fd92115eaf76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_f3cfe937-af04-41c7-8bab-8f912bf0ae9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_eb6fbd68-d051-4ebd-b4ae-fd92115eaf76" xlink:to="loc_us-gaap_RestrictedCashCurrent_f3cfe937-af04-41c7-8bab-8f912bf0ae9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_e6d3f89f-175c-4414-a482-102bdcb627e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_eb6fbd68-d051-4ebd-b4ae-fd92115eaf76" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_e6d3f89f-175c-4414-a482-102bdcb627e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_5c654752-6115-4684-94e6-d45a7615d660" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_e6d3f89f-175c-4414-a482-102bdcb627e4" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_5c654752-6115-4684-94e6-d45a7615d660" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5c654752-6115-4684-94e6-d45a7615d660_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_5c654752-6115-4684-94e6-d45a7615d660" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_5c654752-6115-4684-94e6-d45a7615d660_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_9ebf6318-7a17-4efa-8da4-02c61211e087" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_5c654752-6115-4684-94e6-d45a7615d660" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_9ebf6318-7a17-4efa-8da4-02c61211e087" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SecuritizedDebtReservesMember_3a40a97c-0197-49f0-903f-a196f8c88c76" xlink:href="din-20201231.xsd#din_SecuritizedDebtReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_9ebf6318-7a17-4efa-8da4-02c61211e087" xlink:to="loc_din_SecuritizedDebtReservesMember_3a40a97c-0197-49f0-903f-a196f8c88c76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AdvertisingFundsMember_8b0f5e13-a7ae-4a35-8d6a-aaeab80223c4" xlink:href="din-20201231.xsd#din_AdvertisingFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_9ebf6318-7a17-4efa-8da4-02c61211e087" xlink:to="loc_din_AdvertisingFundsMember_8b0f5e13-a7ae-4a35-8d6a-aaeab80223c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherRestrictedCashCurrentMember_e6643ee1-6e72-420e-aee6-9d078f9c536e" xlink:href="din-20201231.xsd#din_OtherRestrictedCashCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_9ebf6318-7a17-4efa-8da4-02c61211e087" xlink:to="loc_din_OtherRestrictedCashCurrentMember_e6643ee1-6e72-420e-aee6-9d078f9c536e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails" xlink:type="extended" id="ib600cc5efff5426382a6320e3c2f20bd_BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_53b0eebf-7ebc-4e5e-bb93-1acd4f271105" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_cd978832-544f-4ea4-83fb-2b4d9ec23845" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_53b0eebf-7ebc-4e5e-bb93-1acd4f271105" xlink:to="loc_us-gaap_LongTermDebtFairValue_cd978832-544f-4ea4-83fb-2b4d9ec23845" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_46daf670-719b-411f-befe-2ba95603a1ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_53b0eebf-7ebc-4e5e-bb93-1acd4f271105" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_46daf670-719b-411f-befe-2ba95603a1ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_46daf670-719b-411f-befe-2ba95603a1ed" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_46181d09-cfc4-46f5-82b1-bba0c84b24cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_2c8b1212-0c0a-4cef-8e3f-8e50b0ee5cae" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_46181d09-cfc4-46f5-82b1-bba0c84b24cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_913534ec-9ae0-4f3c-ba7f-4f0297b4d6bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_46181d09-cfc4-46f5-82b1-bba0c84b24cc" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_913534ec-9ae0-4f3c-ba7f-4f0297b4d6bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_0170f106-3381-488d-8372-935ca63d6b52" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_913534ec-9ae0-4f3c-ba7f-4f0297b4d6bf" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_0170f106-3381-488d-8372-935ca63d6b52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_91699a1f-4b60-4a59-9ebf-cc13fb88573d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_913534ec-9ae0-4f3c-ba7f-4f0297b4d6bf" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_91699a1f-4b60-4a59-9ebf-cc13fb88573d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2563cbfc-a179-413a-83d2-ad17d04c2cd7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_46daf670-719b-411f-befe-2ba95603a1ed" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2563cbfc-a179-413a-83d2-ad17d04c2cd7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2563cbfc-a179-413a-83d2-ad17d04c2cd7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2563cbfc-a179-413a-83d2-ad17d04c2cd7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2563cbfc-a179-413a-83d2-ad17d04c2cd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f9d594e1-25fa-45cc-b65c-cf312040bfc5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2563cbfc-a179-413a-83d2-ad17d04c2cd7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f9d594e1-25fa-45cc-b65c-cf312040bfc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_73c2650f-c0f8-45bf-9bc8-6ff8b4b5dff7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f9d594e1-25fa-45cc-b65c-cf312040bfc5" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_73c2650f-c0f8-45bf-9bc8-6ff8b4b5dff7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosures" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosures"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosures" xlink:type="extended" id="i964e5169a9f14e08b6075c69ab4efdd1_RevenueDisclosures"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresTables" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresTables" xlink:type="extended" id="i404f08408d9346a9bd06a7fa4690f4f2_RevenueDisclosuresTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails" xlink:type="extended" id="i701525b1037341289f0c687a60ea4816_RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_638f799f-bd2f-4e04-b04e-09ebae9c45fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f614766d-0ee3-4422-9af7-ebcac3acb9d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_638f799f-bd2f-4e04-b04e-09ebae9c45fd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f614766d-0ee3-4422-9af7-ebcac3acb9d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_2cc22c46-c46f-40d7-96bd-25205842d16b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_638f799f-bd2f-4e04-b04e-09ebae9c45fd" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_2cc22c46-c46f-40d7-96bd-25205842d16b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_27e5cf27-f4ae-4316-932f-6cf0f9b658e8" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_2cc22c46-c46f-40d7-96bd-25205842d16b" xlink:to="loc_srt_ProductOrServiceAxis_27e5cf27-f4ae-4316-932f-6cf0f9b658e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_27e5cf27-f4ae-4316-932f-6cf0f9b658e8_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_27e5cf27-f4ae-4316-932f-6cf0f9b658e8" xlink:to="loc_srt_ProductsAndServicesDomain_27e5cf27-f4ae-4316-932f-6cf0f9b658e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b33ba1ef-81a9-4076-acdc-05bb89ba5b67" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_27e5cf27-f4ae-4316-932f-6cf0f9b658e8" xlink:to="loc_srt_ProductsAndServicesDomain_b33ba1ef-81a9-4076-acdc-05bb89ba5b67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b33ba1ef-81a9-4076-acdc-05bb89ba5b67" xlink:to="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RoyaltiesMember_b8f388e4-9ddb-4eb2-ae1d-5c9c876793ba" xlink:href="din-20201231.xsd#din_RoyaltiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:to="loc_din_RoyaltiesMember_b8f388e4-9ddb-4eb2-ae1d-5c9c876793ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_74404e7a-2ee5-4d38-9fd6-5f64a81b8f49" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdvertisingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:to="loc_us-gaap_AdvertisingMember_74404e7a-2ee5-4d38-9fd6-5f64a81b8f49" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PancakeAndWaffleDryMixMember_c4313814-bd9c-48e5-96c2-cdf2c5c9cd15" xlink:href="din-20201231.xsd#din_PancakeAndWaffleDryMixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:to="loc_din_PancakeAndWaffleDryMixMember_c4313814-bd9c-48e5-96c2-cdf2c5c9cd15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseAndDevelopmentFeesMember_1c6aa744-7f88-4ae6-8d96-a86c8a3ec51e" xlink:href="din-20201231.xsd#din_FranchiseAndDevelopmentFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_f701727e-185a-4c0c-8c8d-c98cd416cb10" xlink:to="loc_din_FranchiseAndDevelopmentFeesMember_1c6aa744-7f88-4ae6-8d96-a86c8a3ec51e" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDetails" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDetails" xlink:type="extended" id="if22fffec0edd4fde94d4bfc4b4819e0a_RevenueDisclosuresDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_b790b838-b906-4ea1-8707-f60f5067b3d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_98ef6943-05e3-4bd5-9a82-b2db55c63e35" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_b790b838-b906-4ea1-8707-f60f5067b3d3" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_98ef6943-05e3-4bd5-9a82-b2db55c63e35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_ad8e2608-c3e2-4d9c-b1f0-6d0c82a378d5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_b790b838-b906-4ea1-8707-f60f5067b3d3" xlink:to="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_ad8e2608-c3e2-4d9c-b1f0-6d0c82a378d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_377e2bab-be68-4a3b-ab76-a6a2bb6ac470" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_b790b838-b906-4ea1-8707-f60f5067b3d3" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_377e2bab-be68-4a3b-ab76-a6a2bb6ac470" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_5be967b2-41f0-4683-9dbb-8279bae5f27e" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_377e2bab-be68-4a3b-ab76-a6a2bb6ac470" xlink:to="loc_srt_ProductOrServiceAxis_5be967b2-41f0-4683-9dbb-8279bae5f27e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5be967b2-41f0-4683-9dbb-8279bae5f27e_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_5be967b2-41f0-4683-9dbb-8279bae5f27e" xlink:to="loc_srt_ProductsAndServicesDomain_5be967b2-41f0-4683-9dbb-8279bae5f27e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_00d01798-a02a-4c04-9d35-22b32dba9032" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_5be967b2-41f0-4683-9dbb-8279bae5f27e" xlink:to="loc_srt_ProductsAndServicesDomain_00d01798-a02a-4c04-9d35-22b32dba9032" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseRevenueTransactionsMember_f6b3634e-9704-4106-a67c-c510c77af1a2" xlink:href="din-20201231.xsd#din_FranchiseRevenueTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_00d01798-a02a-4c04-9d35-22b32dba9032" xlink:to="loc_din_FranchiseRevenueTransactionsMember_f6b3634e-9704-4106-a67c-c510c77af1a2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresChangesintheCompanyscontractliabilityfordeferredfranchiseanddevelopmentfeesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresChangesintheCompanyscontractliabilityfordeferredfranchiseanddevelopmentfeesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresChangesintheCompanyscontractliabilityfordeferredfranchiseanddevelopmentfeesDetails" xlink:type="extended" id="i78e150108bf74a848c5909077d5af092_RevenueDisclosuresChangesintheCompanyscontractliabilityfordeferredfranchiseanddevelopmentfeesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails" xlink:type="extended" id="i50af5b5dcaaf4b958e1aecea07a3f841_RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_335c904c-2f2e-4c30-b474-3d693d5eba96" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_335c904c-2f2e-4c30-b474-3d693d5eba96" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_a448fd88-6b8a-4a4f-8a11-1d2fcc707f9d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_a448fd88-6b8a-4a4f-8a11-1d2fcc707f9d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_d6961866-463f-467a-9e32-1b53c1be4b04" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_a448fd88-6b8a-4a4f-8a11-1d2fcc707f9d" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_d6961866-463f-467a-9e32-1b53c1be4b04" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1" xlink:type="simple" xlink:href="din-20201231.xsd#RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1" xlink:type="extended" id="i4bbbad9451424fada625c390158e82d6_RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_335c904c-2f2e-4c30-b474-3d693d5eba96" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_335c904c-2f2e-4c30-b474-3d693d5eba96" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_a448fd88-6b8a-4a4f-8a11-1d2fcc707f9d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_a1b4f6e2-8c50-47ad-afd1-59e77cc4c83c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_a448fd88-6b8a-4a4f-8a11-1d2fcc707f9d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLosses" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLosses"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLosses" xlink:type="extended" id="i8810212a1b0645fc9f6c3af60dd78c73_CurrentExpectedCreditLosses"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesTables" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesTables" xlink:type="extended" id="i25faa705b5904cae9f6fc8716c1abd13_CurrentExpectedCreditLossesTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesNarrativeDetails" xlink:type="extended" id="i27fe811b3d6d4c46a0e7bb410976e9c9_CurrentExpectedCreditLossesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableTerm_3f226e87-48c0-40f0-930e-584e8f2f2ea4" xlink:href="din-20201231.xsd#din_NotesReceivableTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_din_NotesReceivableTerm_3f226e87-48c0-40f0-930e-584e8f2f2ea4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableInterestRate_4669f75a-50cf-4102-8b54-e176b441eb40" xlink:href="din-20201231.xsd#din_NotesReceivableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_din_NotesReceivableInterestRate_4669f75a-50cf-4102-8b54-e176b441eb40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_54898974-e718-4638-b010-3d224bc58764" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_54898974-e718-4638-b010-3d224bc58764" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentLeaseReceivableAverageAnnualInterestRate_88acc4f2-3ee1-4227-9f76-3b4a910c4a20" xlink:href="din-20201231.xsd#din_EquipmentLeaseReceivableAverageAnnualInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_din_EquipmentLeaseReceivableAverageAnnualInterestRate_88acc4f2-3ee1-4227-9f76-3b4a910c4a20" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_c55500f1-1f43-4527-a57e-f57a3ca202d1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_c55500f1-1f43-4527-a57e-f57a3ca202d1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfPropertiesSubjectToGroundLeases_33a00eec-63f2-4fd2-a7b2-b08e41d7bf01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfPropertiesSubjectToGroundLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_us-gaap_NumberOfPropertiesSubjectToGroundLeases_33a00eec-63f2-4fd2-a7b2-b08e41d7bf01" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_1766248e-4ccc-436d-a0d3-4d3c85b3640a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_1766248e-4ccc-436d-a0d3-4d3c85b3640a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_1c6f9745-a462-4252-bafe-e060e77ccaa4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7d953d24-f52d-411a-aef0-4a2445841b59" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_1c6f9745-a462-4252-bafe-e060e77ccaa4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b0ec416f-17d0-44f4-94a4-075b03aa2d84" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_1c6f9745-a462-4252-bafe-e060e77ccaa4" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b0ec416f-17d0-44f4-94a4-075b03aa2d84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_b0ec416f-17d0-44f4-94a4-075b03aa2d84_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b0ec416f-17d0-44f4-94a4-075b03aa2d84" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_b0ec416f-17d0-44f4-94a4-075b03aa2d84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b0ec416f-17d0-44f4-94a4-075b03aa2d84" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivablePortfolioSegmentMember_a688d336-a1ce-4987-b185-bde0c2d514f2" xlink:href="din-20201231.xsd#din_NotesReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:to="loc_din_NotesReceivablePortfolioSegmentMember_a688d336-a1ce-4987-b185-bde0c2d514f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_4abef0b2-242a-44c4-b2c2-171e878eb73a" xlink:href="din-20201231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_4abef0b2-242a-44c4-b2c2-171e878eb73a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_e8339cff-f8e8-404f-87cf-636e3d3be0a0" xlink:href="din-20201231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_e8339cff-f8e8-404f-87cf-636e3d3be0a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DirectFinancingLeasesMember_26f0a3ef-c963-4cb3-ae21-482853eee7fd" xlink:href="din-20201231.xsd#din_DirectFinancingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_192920be-4078-4028-bf60-7143cb8057a1" xlink:to="loc_din_DirectFinancingLeasesMember_26f0a3ef-c963-4cb3-ae21-482853eee7fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_4e085447-93c4-4a40-b660-569eb030b182" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_1c6f9745-a462-4252-bafe-e060e77ccaa4" xlink:to="loc_dei_LegalEntityAxis_4e085447-93c4-4a40-b660-569eb030b182" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4e085447-93c4-4a40-b660-569eb030b182_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4e085447-93c4-4a40-b660-569eb030b182" xlink:to="loc_dei_EntityDomain_4e085447-93c4-4a40-b660-569eb030b182_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d0bfe901-61b7-4e92-9526-888f34847d1c" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4e085447-93c4-4a40-b660-569eb030b182" xlink:to="loc_dei_EntityDomain_d0bfe901-61b7-4e92-9526-888f34847d1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_34012a55-c418-432f-b053-eaa20e7ad103" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d0bfe901-61b7-4e92-9526-888f34847d1c" xlink:to="loc_din_ApplebeesMember_34012a55-c418-432f-b053-eaa20e7ad103" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_3486d4fd-1d32-45f0-82a4-405e9d7d437f" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d0bfe901-61b7-4e92-9526-888f34847d1c" xlink:to="loc_din_IhopMember_3486d4fd-1d32-45f0-82a4-405e9d7d437f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01b872ba-4437-47b3-9cde-edac5972543f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_1c6f9745-a462-4252-bafe-e060e77ccaa4" xlink:to="loc_srt_RangeAxis_01b872ba-4437-47b3-9cde-edac5972543f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01b872ba-4437-47b3-9cde-edac5972543f_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01b872ba-4437-47b3-9cde-edac5972543f" xlink:to="loc_srt_RangeMember_01b872ba-4437-47b3-9cde-edac5972543f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5b066fd0-6e9b-4147-9c64-d30b1cd9a436" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01b872ba-4437-47b3-9cde-edac5972543f" xlink:to="loc_srt_RangeMember_5b066fd0-6e9b-4147-9c64-d30b1cd9a436" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_9011428b-6027-49e2-aca0-5843fd7ef49a" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5b066fd0-6e9b-4147-9c64-d30b1cd9a436" xlink:to="loc_srt_MinimumMember_9011428b-6027-49e2-aca0-5843fd7ef49a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_8d3ba827-e722-4fa3-b9a7-99b7c5326470" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5b066fd0-6e9b-4147-9c64-d30b1cd9a436" xlink:to="loc_srt_MaximumMember_8d3ba827-e722-4fa3-b9a7-99b7c5326470" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesComponentsofReceivablesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesComponentsofReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesComponentsofReceivablesDetails" xlink:type="extended" id="i284c04b69cf849d582d558ecfeac3263_CurrentExpectedCreditLossesComponentsofReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ec383c8b-023c-4f8f-8264-4bade6f55049" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ec383c8b-023c-4f8f-8264-4bade6f55049" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_adc74685-a995-4143-bd85-75a14414a8ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_adc74685-a995-4143-bd85-75a14414a8ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_GiftCardReceivables_ba98a63e-156b-4e7f-87f4-897e9f2a9aa1" xlink:href="din-20201231.xsd#din_GiftCardReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_din_GiftCardReceivables_ba98a63e-156b-4e7f-87f4-897e9f2a9aa1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivable_5ae87c8b-f6ac-484b-9008-9971e630c437" xlink:href="din-20201231.xsd#din_NotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_din_NotesReceivable_5ae87c8b-f6ac-484b-9008-9971e630c437" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_8675225d-6511-4109-bcd3-daf947b7d1b2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_NotesReceivableNet_8675225d-6511-4109-bcd3-daf947b7d1b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivables_dfb0c7dc-8c33-45f3-a259-2a22b89b7c63" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_OtherReceivables_dfb0c7dc-8c33-45f3-a259-2a22b89b7c63" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AccountsOtherNotesAndFinancingReceivablesGross_6f9b42ef-a310-4c3e-b10e-901504cdc195" xlink:href="din-20201231.xsd#din_AccountsOtherNotesAndFinancingReceivablesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_din_AccountsOtherNotesAndFinancingReceivablesGross_6f9b42ef-a310-4c3e-b10e-901504cdc195" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_5a80e876-c9cd-4615-a128-cc58b6757614" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_5a80e876-c9cd-4615-a128-cc58b6757614" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AccountsOtherNotesAndFinanceReceivablesNet_6b51183b-6c8a-4fcb-9d9d-c8c68225bf47" xlink:href="din-20201231.xsd#din_AccountsOtherNotesAndFinanceReceivablesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_din_AccountsOtherNotesAndFinanceReceivablesNet_6b51183b-6c8a-4fcb-9d9d-c8c68225bf47" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_ca1da17b-1ede-4d37-92c3-c13e045739dc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_ca1da17b-1ede-4d37-92c3-c13e045739dc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent_d3c165a6-0133-48a2-ac22-a1a5da1c1c7f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_300efdd4-3fdf-47e9-b935-a57052983e14" xlink:to="loc_us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent_d3c165a6-0133-48a2-ac22-a1a5da1c1c7f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_b32b8ee0-ab72-4653-8d8e-d5541c8f3b4d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ec383c8b-023c-4f8f-8264-4bade6f55049" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_b32b8ee0-ab72-4653-8d8e-d5541c8f3b4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_72050688-3ab4-40d1-8775-d12c4a084a1e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_be61f16e-6b67-4c77-b204-90e3a99aa22a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_b32b8ee0-ab72-4653-8d8e-d5541c8f3b4d" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_be61f16e-6b67-4c77-b204-90e3a99aa22a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_336575ed-1416-484a-8c71-74b0ebf11b9e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_b32b8ee0-ab72-4653-8d8e-d5541c8f3b4d" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_336575ed-1416-484a-8c71-74b0ebf11b9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_f71572fa-3f85-4916-ba7a-fc691e5b950c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_b32b8ee0-ab72-4653-8d8e-d5541c8f3b4d" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_f71572fa-3f85-4916-ba7a-fc691e5b950c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_7de19d51-0b88-46e6-b97b-1af2a22f5836" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_fe98c641-c393-44a0-9ef6-6f2b1dbfbf13" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ec383c8b-023c-4f8f-8264-4bade6f55049" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_fe98c641-c393-44a0-9ef6-6f2b1dbfbf13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_617603b0-6686-4d7f-ab1d-a15e1a5a168d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_fe98c641-c393-44a0-9ef6-6f2b1dbfbf13" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_617603b0-6686-4d7f-ab1d-a15e1a5a168d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_617603b0-6686-4d7f-ab1d-a15e1a5a168d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_617603b0-6686-4d7f-ab1d-a15e1a5a168d" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_617603b0-6686-4d7f-ab1d-a15e1a5a168d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_59b62d4a-e3fc-499f-bc0c-78c02ba9bdb3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_617603b0-6686-4d7f-ab1d-a15e1a5a168d" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_59b62d4a-e3fc-499f-bc0c-78c02ba9bdb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentLeasesReceivableMember_2403e33c-055f-465b-a59c-b40e3bace228" xlink:href="din-20201231.xsd#din_EquipmentLeasesReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_59b62d4a-e3fc-499f-bc0c-78c02ba9bdb3" xlink:to="loc_din_EquipmentLeasesReceivableMember_2403e33c-055f-465b-a59c-b40e3bace228" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DirectFinancingLeasesMember_ff556ac5-361f-4dd3-aa37-0ca5b8a27246" xlink:href="din-20201231.xsd#din_DirectFinancingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_59b62d4a-e3fc-499f-bc0c-78c02ba9bdb3" xlink:to="loc_din_DirectFinancingLeasesMember_ff556ac5-361f-4dd3-aa37-0ca5b8a27246" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseFeeNoteReceivableMember_c79e3b92-9d69-487c-994c-cdf760bad407" xlink:href="din-20201231.xsd#din_FranchiseFeeNoteReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_59b62d4a-e3fc-499f-bc0c-78c02ba9bdb3" xlink:to="loc_din_FranchiseFeeNoteReceivableMember_c79e3b92-9d69-487c-994c-cdf760bad407" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesChangesintheAllowanceforCreditLossesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesChangesintheAllowanceforCreditLossesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesChangesintheAllowanceforCreditLossesDetails" xlink:type="extended" id="i4d3b927d3ae94197b9e8bc9793f317e8_CurrentExpectedCreditLossesChangesintheAllowanceforCreditLossesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_0c589c20-2d97-468e-a6e8-d50fe0b72332" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_0c589c20-2d97-468e-a6e8-d50fe0b72332" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_22167ee6-3be0-4875-9054-ad343a7af2bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_22167ee6-3be0-4875-9054-ad343a7af2bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_bc96617e-3e63-40d5-ac35-235b5110327c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_bc96617e-3e63-40d5-ac35-235b5110327c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment_d70fb85f-1ad9-441c-be43-1d5c5f0610e4" xlink:href="din-20201231.xsd#din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:to="loc_din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment_d70fb85f-1ad9-441c-be43-1d5c5f0610e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_85cfbf4a-4751-4dc5-bb23-9fc2b5d79274" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_85cfbf4a-4751-4dc5-bb23-9fc2b5d79274" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_bcda5f60-0a53-4b51-bc17-a8e269a38e3d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_c9d354ee-ad8c-48f8-8dbc-5ce4b69c88af" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_bcda5f60-0a53-4b51-bc17-a8e269a38e3d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses_f986ec72-71ab-4456-b808-ed004ed05072" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_cea1fd58-4968-434f-9bfd-6c96072abecb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_0c589c20-2d97-468e-a6e8-d50fe0b72332" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_cea1fd58-4968-434f-9bfd-6c96072abecb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_2ac59e09-3cad-4160-b116-6067122b2dc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_cea1fd58-4968-434f-9bfd-6c96072abecb" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_2ac59e09-3cad-4160-b116-6067122b2dc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ac59e09-3cad-4160-b116-6067122b2dc0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_2ac59e09-3cad-4160-b116-6067122b2dc0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ac59e09-3cad-4160-b116-6067122b2dc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_2ac59e09-3cad-4160-b116-6067122b2dc0" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AccountsReceivablePortfolioSegmentMember_25c462e8-22a0-44a4-8c03-7c8a0c3fbcf8" xlink:href="din-20201231.xsd#din_AccountsReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_AccountsReceivablePortfolioSegmentMember_25c462e8-22a0-44a4-8c03-7c8a0c3fbcf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentPortfolioSegmentMember_e718b8ac-4383-44e1-a23d-adc5b6ade6b3" xlink:href="din-20201231.xsd#din_NotesReceivableCurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_NotesReceivableCurrentPortfolioSegmentMember_e718b8ac-4383-44e1-a23d-adc5b6ade6b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_db0fc20e-81e1-4ee1-bb3a-54827a6a6a58" xlink:href="din-20201231.xsd#din_NotesReceivableNoncurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_db0fc20e-81e1-4ee1-bb3a-54827a6a6a58" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_3cae1f60-6375-46e0-b4a7-e38428b4433e" xlink:href="din-20201231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_3cae1f60-6375-46e0-b4a7-e38428b4433e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_b738ee36-69e7-4645-91fb-76ac0bf1f78f" xlink:href="din-20201231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_b738ee36-69e7-4645-91fb-76ac0bf1f78f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherPortfolioSegmentMember_0d01bd2f-2786-4a8b-a0b5-4a656921284c" xlink:href="din-20201231.xsd#din_OtherPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_a36e9ee6-027f-4dba-b8af-408e3d7c72c8" xlink:to="loc_din_OtherPortfolioSegmentMember_0d01bd2f-2786-4a8b-a0b5-4a656921284c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8b28d2b4-8954-49d7-922f-a5fef6aea70f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_cea1fd58-4968-434f-9bfd-6c96072abecb" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8b28d2b4-8954-49d7-922f-a5fef6aea70f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8b28d2b4-8954-49d7-922f-a5fef6aea70f_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8b28d2b4-8954-49d7-922f-a5fef6aea70f" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8b28d2b4-8954-49d7-922f-a5fef6aea70f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_98f9f274-5af0-4460-8448-4123c91c6db2" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_8b28d2b4-8954-49d7-922f-a5fef6aea70f" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_98f9f274-5af0-4460-8448-4123c91c6db2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_0ef7efe3-a46a-43dd-ab47-c2e0a17a3dc2" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_98f9f274-5af0-4460-8448-4123c91c6db2" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_0ef7efe3-a46a-43dd-ab47-c2e0a17a3dc2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesDelinquencyStatusofReceivablesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesDelinquencyStatusofReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesDelinquencyStatusofReceivablesDetails" xlink:type="extended" id="i5f7379becc994aaa9b3402ead536460f_CurrentExpectedCreditLossesDelinquencyStatusofReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bb5661a9-6050-4668-a93a-df9c998dbc38" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_f61edc38-7574-40f9-a50a-cdd6863f7057" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bb5661a9-6050-4668-a93a-df9c998dbc38" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_f61edc38-7574-40f9-a50a-cdd6863f7057" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_7dea80d8-aeec-4be3-a730-8c957c4d28b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bb5661a9-6050-4668-a93a-df9c998dbc38" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_7dea80d8-aeec-4be3-a730-8c957c4d28b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_9aae54c0-5cb4-41d5-a488-86a5f6a34c57" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bb5661a9-6050-4668-a93a-df9c998dbc38" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_9aae54c0-5cb4-41d5-a488-86a5f6a34c57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2de010f8-848d-4d53-bda0-025454a3d607" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_bb5661a9-6050-4668-a93a-df9c998dbc38" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2de010f8-848d-4d53-bda0-025454a3d607" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cf451a3f-17ac-4854-94c1-29bc8c132d22" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2de010f8-848d-4d53-bda0-025454a3d607" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cf451a3f-17ac-4854-94c1-29bc8c132d22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cf451a3f-17ac-4854-94c1-29bc8c132d22_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cf451a3f-17ac-4854-94c1-29bc8c132d22" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_cf451a3f-17ac-4854-94c1-29bc8c132d22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_cf451a3f-17ac-4854-94c1-29bc8c132d22" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentPortfolioSegmentMember_6848baca-9ba0-4fc4-9230-88f0901c1738" xlink:href="din-20201231.xsd#din_NotesReceivableCurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:to="loc_din_NotesReceivableCurrentPortfolioSegmentMember_6848baca-9ba0-4fc4-9230-88f0901c1738" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_cea6b5f8-ba06-4db2-acf7-1e2efaae01b8" xlink:href="din-20201231.xsd#din_NotesReceivableNoncurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:to="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_cea6b5f8-ba06-4db2-acf7-1e2efaae01b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_447d6a5a-4ea0-4980-b0a6-de6379182b02" xlink:href="din-20201231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_447d6a5a-4ea0-4980-b0a6-de6379182b02" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_79681df5-0374-4076-964f-b7bbadb8048f" xlink:href="din-20201231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_79681df5-0374-4076-964f-b7bbadb8048f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherPortfolioSegmentMember_affbd09e-bf9b-4d0a-8ff9-9de4890ceb0f" xlink:href="din-20201231.xsd#din_OtherPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_87db3f01-ab7c-428a-9b2a-1b5385babb05" xlink:to="loc_din_OtherPortfolioSegmentMember_affbd09e-bf9b-4d0a-8ff9-9de4890ceb0f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_6e00d275-a89b-4f7c-b05f-73e9c091777d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2de010f8-848d-4d53-bda0-025454a3d607" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_6e00d275-a89b-4f7c-b05f-73e9c091777d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_6e00d275-a89b-4f7c-b05f-73e9c091777d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_6e00d275-a89b-4f7c-b05f-73e9c091777d" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_6e00d275-a89b-4f7c-b05f-73e9c091777d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_6e00d275-a89b-4f7c-b05f-73e9c091777d" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_6a3fe49a-d1df-4dfe-90f2-1e4cc2f2c11e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:to="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_6a3fe49a-d1df-4dfe-90f2-1e4cc2f2c11e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_92c6a42b-9c76-4e97-b0db-4f31d3b37c30" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_92c6a42b-9c76-4e97-b0db-4f31d3b37c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancialAsset90to119DaysPastDueMember_b2ca4887-5991-4ada-b3f4-76e82193cc72" xlink:href="din-20201231.xsd#din_FinancialAsset90to119DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:to="loc_din_FinancialAsset90to119DaysPastDueMember_b2ca4887-5991-4ada-b3f4-76e82193cc72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancialAsset120OrMoreDaysPastDueMember_04b0472b-9af3-404a-86eb-a00ccb8fa3e2" xlink:href="din-20201231.xsd#din_FinancialAsset120OrMoreDaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_33db90ef-2df5-4e8b-bacd-1c7f230129e2" xlink:to="loc_din_FinancialAsset120OrMoreDaysPastDueMember_04b0472b-9af3-404a-86eb-a00ccb8fa3e2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesYearofOriginationofFinancingReceivablesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CurrentExpectedCreditLossesYearofOriginationofFinancingReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesYearofOriginationofFinancingReceivablesDetails" xlink:type="extended" id="ied3e3e4b88be4826a03e59055135c745_CurrentExpectedCreditLossesYearofOriginationofFinancingReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_91966357-8ff7-490a-a4e0-5800e48391ee" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear_91966357-8ff7-490a-a4e0-5800e48391ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_db6f4c81-a52b-469d-ae45-f7861c106839" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_db6f4c81-a52b-469d-ae45-f7861c106839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_4774ad31-decd-48b8-b0fd-92881ce1887e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear_4774ad31-decd-48b8-b0fd-92881ce1887e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_6bfd3311-e5d1-4117-9910-cfe0432c4637" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear_6bfd3311-e5d1-4117-9910-cfe0432c4637" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_327174ec-bf7b-4b0f-94b6-0f2c182962bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear_327174ec-bf7b-4b0f-94b6-0f2c182962bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_b5e68635-5951-48c8-a0aa-ab2629980f8d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear_b5e68635-5951-48c8-a0aa-ab2629980f8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_7a2780b0-1083-41cb-9a77-636db019aeb9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_NotesReceivableGross_7a2780b0-1083-41cb-9a77-636db019aeb9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_1c34d783-f6a6-4c71-aecc-cdcc5a869f8d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d4a7d970-12d8-40dd-b090-fb11f12da47f" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_1c34d783-f6a6-4c71-aecc-cdcc5a869f8d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_fb2d0f49-7f98-49c9-888e-2e7bc3817955" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_1c34d783-f6a6-4c71-aecc-cdcc5a869f8d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_fb2d0f49-7f98-49c9-888e-2e7bc3817955" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_fb2d0f49-7f98-49c9-888e-2e7bc3817955_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_fb2d0f49-7f98-49c9-888e-2e7bc3817955" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_fb2d0f49-7f98-49c9-888e-2e7bc3817955_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f85c93bb-f073-4e8d-8064-399dac98db0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_fb2d0f49-7f98-49c9-888e-2e7bc3817955" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f85c93bb-f073-4e8d-8064-399dac98db0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentPortfolioSegmentMember_56210586-d904-4dbe-9b56-e8b26d148d51" xlink:href="din-20201231.xsd#din_NotesReceivableCurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f85c93bb-f073-4e8d-8064-399dac98db0b" xlink:to="loc_din_NotesReceivableCurrentPortfolioSegmentMember_56210586-d904-4dbe-9b56-e8b26d148d51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_c8c867e4-0408-4293-8a9f-3738ebc3636e" xlink:href="din-20201231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f85c93bb-f073-4e8d-8064-399dac98db0b" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_c8c867e4-0408-4293-8a9f-3738ebc3636e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_59376cf5-5419-476a-be94-b1e81baf0505" xlink:href="din-20201231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f85c93bb-f073-4e8d-8064-399dac98db0b" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_59376cf5-5419-476a-be94-b1e81baf0505" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/PropertyandEquipment" xlink:type="simple" xlink:href="din-20201231.xsd#PropertyandEquipment"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/PropertyandEquipment" xlink:type="extended" id="ie5f3bf2f05fb48ce82a39f822cd1a177_PropertyandEquipment"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/PropertyandEquipmentTables" xlink:type="simple" xlink:href="din-20201231.xsd#PropertyandEquipmentTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/PropertyandEquipmentTables" xlink:type="extended" id="i5f53593c9a3645909c7f3a135f2f25a9_PropertyandEquipmentTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/PropertyandEquipmentNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#PropertyandEquipmentNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/PropertyandEquipmentNarrativeDetails" xlink:type="extended" id="i78922a0d5c37417dbd9bb7f8ac0ffd74_PropertyandEquipmentNarrativeDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="din-20201231.xsd#PropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/PropertyandEquipmentDetails" xlink:type="extended" id="ibab9dfce76dc4ab2ae39e78af55baf63_PropertyandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_fe4623c2-9762-49eb-a340-e7026bb87492" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_fe4623c2-9762-49eb-a340-e7026bb87492" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_dc4b49a8-ee28-4c46-8bd0-e24c64067d4c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_dc4b49a8-ee28-4c46-8bd0-e24c64067d4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_68dee71a-00c2-4fb4-b910-5281cb9d4cec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_68dee71a-00c2-4fb4-b910-5281cb9d4cec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_c2b4ae90-9cd6-476f-a04a-43270e8306f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_c2b4ae90-9cd6-476f-a04a-43270e8306f3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_1ed5d5b0-acae-44bb-8e4f-41c7a5eadcd3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_1ed5d5b0-acae-44bb-8e4f-41c7a5eadcd3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c6ee894b-1afc-4abc-8c1a-3ea5a577040f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_8fe2ead4-0321-44d1-897a-02b33d61370e" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c6ee894b-1afc-4abc-8c1a-3ea5a577040f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c6ee894b-1afc-4abc-8c1a-3ea5a577040f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_6e9d8c26-92c7-4ec1-8397-dbeb8a7264ae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_8b9f99be-43b6-4d3c-a0c7-6ae2a3bbc83f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_8b9f99be-43b6-4d3c-a0c7-6ae2a3bbc83f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PropertiesUnderFinanceLeaseMember_a29c2fdb-1bb6-4117-87d6-5ea2d26d87c7" xlink:href="din-20201231.xsd#din_PropertiesUnderFinanceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_din_PropertiesUnderFinanceLeaseMember_a29c2fdb-1bb6-4117-87d6-5ea2d26d87c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentAndFixturesMember_7e876d03-8297-4ea5-947b-87254b0714c7" xlink:href="din-20201231.xsd#din_EquipmentAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_din_EquipmentAndFixturesMember_7e876d03-8297-4ea5-947b-87254b0714c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_9eaa3b7d-4582-4880-9379-b415e3b78ddb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_9eaa3b7d-4582-4880-9379-b415e3b78ddb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_e5d46a56-e7ff-49db-b475-ae99dc7129ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_us-gaap_LandMember_e5d46a56-e7ff-49db-b475-ae99dc7129ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_3d0757d8-440f-4f1f-9fc6-2c438e78dcb2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_3d0757d8-440f-4f1f-9fc6-2c438e78dcb2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_ca502c7f-1e5e-4728-ac4c-404e33131cd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_98220b9e-ce16-400d-b6ff-645a4ca5f4d2" xlink:to="loc_us-gaap_ConstructionInProgressMember_ca502c7f-1e5e-4728-ac4c-404e33131cd4" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/Goodwill" xlink:type="simple" xlink:href="din-20201231.xsd#Goodwill"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/Goodwill" xlink:type="extended" id="if97967893c0a4a0c9aaa03bbc859fbf9_Goodwill"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillTables" xlink:type="simple" xlink:href="din-20201231.xsd#GoodwillTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillTables" xlink:type="extended" id="ie1dde34201c647e9985c7edfea89689d_GoodwillTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillChangesInCarryingAmountofGoodwillDetails" xlink:type="simple" xlink:href="din-20201231.xsd#GoodwillChangesInCarryingAmountofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillChangesInCarryingAmountofGoodwillDetails" xlink:type="extended" id="i456e36e39a224a8d8f5816e6a1198065_GoodwillChangesInCarryingAmountofGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_9d3b73d4-c306-4002-ab5e-fa757475bb3a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9d3b73d4-c306-4002-ab5e-fa757475bb3a" xlink:to="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_612f076a-673d-4d02-a8fd-0dd5a6129dbf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:to="loc_us-gaap_Goodwill_612f076a-673d-4d02-a8fd-0dd5a6129dbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_4f46e6e3-3d2a-4a88-883e-ce66b9b57754" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_4f46e6e3-3d2a-4a88-883e-ce66b9b57754" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_1e6a7b06-8f35-4f42-a1ab-606e662dfc0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_1e6a7b06-8f35-4f42-a1ab-606e662dfc0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_a96f4f9f-b799-4c52-9fd0-2d3f9e92fc0b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_1d78a40d-3fba-4aeb-858c-87e4cd739b15" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_a96f4f9f-b799-4c52-9fd0-2d3f9e92fc0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_c040fc90-45da-46d9-b0ed-f451712dd53c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_d9baa1a2-5bfc-43d0-8f52-d43e5fc4c821" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_9d3b73d4-c306-4002-ab5e-fa757475bb3a" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_d9baa1a2-5bfc-43d0-8f52-d43e5fc4c821" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_d9baa1a2-5bfc-43d0-8f52-d43e5fc4c821" xlink:to="loc_dei_LegalEntityAxis_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946" xlink:to="loc_dei_EntityDomain_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_34d18150-4e72-45df-9d75-18b829500fde" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_001fa8e3-1fe1-4d5c-b3a9-1630cefb8946" xlink:to="loc_dei_EntityDomain_34d18150-4e72-45df-9d75-18b829500fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_df588fa3-aed5-44fb-be39-a1d7589ae065" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_34d18150-4e72-45df-9d75-18b829500fde" xlink:to="loc_din_ApplebeesMember_df588fa3-aed5-44fb-be39-a1d7589ae065" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_2d0bb438-ff99-4bb9-807a-78a3c854723e" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_34d18150-4e72-45df-9d75-18b829500fde" xlink:to="loc_din_IhopMember_2d0bb438-ff99-4bb9-807a-78a3c854723e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_9bd24d8e-e2cb-456c-90bd-887eebabe142" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_d9baa1a2-5bfc-43d0-8f52-d43e5fc4c821" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_9bd24d8e-e2cb-456c-90bd-887eebabe142" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_9bd24d8e-e2cb-456c-90bd-887eebabe142_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_9bd24d8e-e2cb-456c-90bd-887eebabe142" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_9bd24d8e-e2cb-456c-90bd-887eebabe142_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_e42ac3de-f694-4c16-b6c0-0f863310ebd8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_9bd24d8e-e2cb-456c-90bd-887eebabe142" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_e42ac3de-f694-4c16-b6c0-0f863310ebd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_8170e0a9-17c2-427e-8f30-6a4f2040c620" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_e42ac3de-f694-4c16-b6c0-0f863310ebd8" xlink:to="loc_us-gaap_FranchisedUnitsMember_8170e0a9-17c2-427e-8f30-6a4f2040c620" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_800d5588-d872-49fc-86b9-f023eebde5fa" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_e42ac3de-f694-4c16-b6c0-0f863310ebd8" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_800d5588-d872-49fc-86b9-f023eebde5fa" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillGrossandnetcarryingamountsofgoodwillDetails" xlink:type="simple" xlink:href="din-20201231.xsd#GoodwillGrossandnetcarryingamountsofgoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillGrossandnetcarryingamountsofgoodwillDetails" xlink:type="extended" id="i37722bc63dcc4060a195f7f44fe7321a_GoodwillGrossandnetcarryingamountsofgoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_bb0c29db-98c0-4ac7-8063-112aaa90d468" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_2a1cd710-766e-40d8-8112-e959101dc2de" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_bb0c29db-98c0-4ac7-8063-112aaa90d468" xlink:to="loc_us-gaap_GoodwillGross_2a1cd710-766e-40d8-8112-e959101dc2de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_409f1315-36c6-401c-9a2f-3fa03b797fc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_bb0c29db-98c0-4ac7-8063-112aaa90d468" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_409f1315-36c6-401c-9a2f-3fa03b797fc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_f4b97894-0da6-428b-a334-940feab213d5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_bb0c29db-98c0-4ac7-8063-112aaa90d468" xlink:to="loc_us-gaap_Goodwill_f4b97894-0da6-428b-a334-940feab213d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_07736322-0470-4128-9460-6a325a8e9c7d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_bb0c29db-98c0-4ac7-8063-112aaa90d468" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_07736322-0470-4128-9460-6a325a8e9c7d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_3591accb-d3e3-4cd1-be7d-47dd670c6e64" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_07736322-0470-4128-9460-6a325a8e9c7d" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_3591accb-d3e3-4cd1-be7d-47dd670c6e64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_3591accb-d3e3-4cd1-be7d-47dd670c6e64_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_3591accb-d3e3-4cd1-be7d-47dd670c6e64" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_3591accb-d3e3-4cd1-be7d-47dd670c6e64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_d3bca072-8761-4277-9805-0ed125c17652" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_3591accb-d3e3-4cd1-be7d-47dd670c6e64" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_d3bca072-8761-4277-9805-0ed125c17652" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_a8a38f1d-1d0d-4cd2-ac89-eca3198214ec" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_d3bca072-8761-4277-9805-0ed125c17652" xlink:to="loc_us-gaap_FranchisedUnitsMember_a8a38f1d-1d0d-4cd2-ac89-eca3198214ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_22ba0c99-8c07-4225-947e-8abde1689644" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_d3bca072-8761-4277-9805-0ed125c17652" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_22ba0c99-8c07-4225-947e-8abde1689644" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_07736322-0470-4128-9460-6a325a8e9c7d" xlink:to="loc_dei_LegalEntityAxis_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da" xlink:to="loc_dei_EntityDomain_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4d65ff74-4147-4517-a6e5-40d727e788ba" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_85ebccc6-5e7b-4ddb-900c-3dc9e75f67da" xlink:to="loc_dei_EntityDomain_4d65ff74-4147-4517-a6e5-40d727e788ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_0e31033f-e2aa-40c0-b385-47a194a9da8e" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4d65ff74-4147-4517-a6e5-40d727e788ba" xlink:to="loc_din_ApplebeesMember_0e31033f-e2aa-40c0-b385-47a194a9da8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_42bc3b4a-5ffd-4f10-928f-a6307f4c404e" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4d65ff74-4147-4517-a6e5-40d727e788ba" xlink:to="loc_din_IhopMember_42bc3b4a-5ffd-4f10-928f-a6307f4c404e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#GoodwillNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillNarrativeDetails" xlink:type="extended" id="i2088c9816aa745e0a0870683755eccbd_GoodwillNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_eaa984c8-0add-405b-8079-a63a6089a2ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_7e47c755-75c6-4512-83d5-1da45b89ecd2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_eaa984c8-0add-405b-8079-a63a6089a2ae" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_7e47c755-75c6-4512-83d5-1da45b89ecd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_ac1f9052-3ed1-40af-ab66-18230591c99f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_eaa984c8-0add-405b-8079-a63a6089a2ae" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_ac1f9052-3ed1-40af-ab66-18230591c99f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_e3878fd7-dcfe-4fd9-85b6-6b4691383507" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ac1f9052-3ed1-40af-ab66-18230591c99f" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_e3878fd7-dcfe-4fd9-85b6-6b4691383507" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_e3878fd7-dcfe-4fd9-85b6-6b4691383507_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_e3878fd7-dcfe-4fd9-85b6-6b4691383507" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_e3878fd7-dcfe-4fd9-85b6-6b4691383507_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_d6885726-c8e8-4e02-a938-6fddafdb91da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_e3878fd7-dcfe-4fd9-85b6-6b4691383507" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_d6885726-c8e8-4e02-a938-6fddafdb91da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_3dbc7350-8814-44f4-9ffb-29a457cbc08a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_d6885726-c8e8-4e02-a938-6fddafdb91da" xlink:to="loc_us-gaap_FranchisedUnitsMember_3dbc7350-8814-44f4-9ffb-29a457cbc08a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_4eb92992-2381-42a2-a390-0edca8697a1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_d6885726-c8e8-4e02-a938-6fddafdb91da" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_4eb92992-2381-42a2-a390-0edca8697a1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_be145cb9-e908-4f10-ae2a-279ed7fe24cf" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ac1f9052-3ed1-40af-ab66-18230591c99f" xlink:to="loc_dei_LegalEntityAxis_be145cb9-e908-4f10-ae2a-279ed7fe24cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_be145cb9-e908-4f10-ae2a-279ed7fe24cf_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_be145cb9-e908-4f10-ae2a-279ed7fe24cf" xlink:to="loc_dei_EntityDomain_be145cb9-e908-4f10-ae2a-279ed7fe24cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4973eb14-650d-4328-b865-181cf75afac1" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_be145cb9-e908-4f10-ae2a-279ed7fe24cf" xlink:to="loc_dei_EntityDomain_4973eb14-650d-4328-b865-181cf75afac1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_faa31ab6-e134-4050-bb56-3c10c3e11294" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4973eb14-650d-4328-b865-181cf75afac1" xlink:to="loc_din_ApplebeesMember_faa31ab6-e134-4050-bb56-3c10c3e11294" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssets" xlink:type="simple" xlink:href="din-20201231.xsd#OtherIntangibleAssets"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssets" xlink:type="extended" id="i38987bace97d49ab847b2b91a07d2a79_OtherIntangibleAssets"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsTables" xlink:type="simple" xlink:href="din-20201231.xsd#OtherIntangibleAssetsTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsTables" xlink:type="extended" id="iaac0feec10cc4c4cb36c79a803ef21f5_OtherIntangibleAssetsTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails" xlink:type="simple" xlink:href="din-20201231.xsd#OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails" xlink:type="extended" id="i49b39e72ad434812af52da27d0f51079_OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5358cd0f-9907-4391-aed9-42de61120d95" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5358cd0f-9907-4391-aed9-42de61120d95" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_8533bb98-0d9e-4716-a626-849191d4a8be" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_8533bb98-0d9e-4716-a626-849191d4a8be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_14519296-a7e9-4ccf-900a-96dae4c67c80" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_14519296-a7e9-4ccf-900a-96dae4c67c80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_395ea8b5-55bd-42fb-8ca9-c3cef8146662" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_395ea8b5-55bd-42fb-8ca9-c3cef8146662" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds_d9b9f217-2a36-43e6-9462-b3bfd0154811" xlink:href="din-20201231.xsd#din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds_d9b9f217-2a36-43e6-9462-b3bfd0154811" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease_6e43aa08-fc3b-4799-a465-f8d7809fb410" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease_6e43aa08-fc3b-4799-a465-f8d7809fb410" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_27b6f684-ac10-4adb-8e92-344677f4b171" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_27b6f684-ac10-4adb-8e92-344677f4b171" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent_dfec7456-8cd5-4dba-b0f1-60aaf31d1ba8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_IncreaseDecreaseInIntangibleAssetsCurrent_dfec7456-8cd5-4dba-b0f1-60aaf31d1ba8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_9ed0c636-7b25-4f07-8a24-ff3c8e54b5db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_9ed0c636-7b25-4f07-8a24-ff3c8e54b5db" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_02d3b9a4-b076-489c-9ffa-6959b057fa29" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_02d3b9a4-b076-489c-9ffa-6959b057fa29" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_2dd3ca84-c4e6-467a-a473-fe6429c4d578" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_64b8f461-525b-4125-afdb-dd39015016c1" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_2dd3ca84-c4e6-467a-a473-fe6429c4d578" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_50303d07-eae6-4dad-9b44-c7326e90bb0a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_396d587d-ff58-49a4-83b0-5bf3140959cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_ee107a33-5023-4b05-a18f-b8d5d6a12078" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_047b0f44-c927-47aa-8228-b74f0c698748" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5358cd0f-9907-4391-aed9-42de61120d95" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_047b0f44-c927-47aa-8228-b74f0c698748" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_236fd904-0f3e-49a5-b89b-8cc37d40df99" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_047b0f44-c927-47aa-8228-b74f0c698748" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_236fd904-0f3e-49a5-b89b-8cc37d40df99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_236fd904-0f3e-49a5-b89b-8cc37d40df99_default" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_236fd904-0f3e-49a5-b89b-8cc37d40df99" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_236fd904-0f3e-49a5-b89b-8cc37d40df99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_236fd904-0f3e-49a5-b89b-8cc37d40df99" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_2ba3b28f-bd2b-4029-985d-a6b8c790d35c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:to="loc_us-gaap_TradeNamesMember_2ba3b28f-bd2b-4029-985d-a6b8c790d35c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_04cbb1ea-cbed-4e6c-b059-479b601ad9f0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_04cbb1ea-cbed-4e6c-b059-479b601ad9f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_e642ef91-baf8-46c8-be1e-17856d80bd2f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:to="loc_us-gaap_FranchiseRightsMember_e642ef91-baf8-46c8-be1e-17856d80bd2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_4aaabf8a-f100-46c9-89a0-a0fc10160cd4" xlink:href="din-20201231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:to="loc_din_ReacquiredFranchiseRightsMember_4aaabf8a-f100-46c9-89a0-a0fc10160cd4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_f852a865-50bf-4427-981c-f5cc1b6d75b0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_36245f35-189c-4789-b41c-38d9e6a90343" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_f852a865-50bf-4427-981c-f5cc1b6d75b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsAxis_2c2ade40-a57d-4b4b-8d07-744fef489c29" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_047b0f44-c927-47aa-8228-b74f0c698748" xlink:to="loc_din_TypeOfIntangibleAssetsAxis_2c2ade40-a57d-4b4b-8d07-744fef489c29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsDomain_2c2ade40-a57d-4b4b-8d07-744fef489c29_default" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_TypeOfIntangibleAssetsAxis_2c2ade40-a57d-4b4b-8d07-744fef489c29" xlink:to="loc_din_TypeOfIntangibleAssetsDomain_2c2ade40-a57d-4b4b-8d07-744fef489c29_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsDomain_bf118399-477f-4a88-a294-628081ee5792" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_TypeOfIntangibleAssetsAxis_2c2ade40-a57d-4b4b-8d07-744fef489c29" xlink:to="loc_din_TypeOfIntangibleAssetsDomain_bf118399-477f-4a88-a294-628081ee5792" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IndefiniteLivedIntangibleAssetsMajorClassNameMember_9354fff5-76a9-4d19-ad79-9e17af265d07" xlink:href="din-20201231.xsd#din_IndefiniteLivedIntangibleAssetsMajorClassNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_TypeOfIntangibleAssetsDomain_bf118399-477f-4a88-a294-628081ee5792" xlink:to="loc_din_IndefiniteLivedIntangibleAssetsMajorClassNameMember_9354fff5-76a9-4d19-ad79-9e17af265d07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteLivedIntangibleAssetsMajorClassNameMember_040021f7-66e1-48af-82e3-6a46dde04ba0" xlink:href="din-20201231.xsd#din_FiniteLivedIntangibleAssetsMajorClassNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_TypeOfIntangibleAssetsDomain_bf118399-477f-4a88-a294-628081ee5792" xlink:to="loc_din_FiniteLivedIntangibleAssetsMajorClassNameMember_040021f7-66e1-48af-82e3-6a46dde04ba0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#OtherIntangibleAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsNarrativeDetails" xlink:type="extended" id="i5545fac854e14751979b3db8e8adc7c6_OtherIntangibleAssetsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_02a5aa03-f355-48d0-8be6-378cdd5ef1ef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_NumberOfRestaurants_02a5aa03-f355-48d0-8be6-378cdd5ef1ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_836105c8-5318-4b94-8b22-4a76de42b359" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_836105c8-5318-4b94-8b22-4a76de42b359" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_5c3cc5a9-9e2f-4bdc-932b-e585693f1e97" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_5c3cc5a9-9e2f-4bdc-932b-e585693f1e97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_01341cd8-f7ff-4acf-91c9-34767539a938" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_01341cd8-f7ff-4acf-91c9-34767539a938" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds_e06d0016-98b1-4fc9-b7bf-ee23f547f4dc" xlink:href="din-20201231.xsd#din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_din_FiniteLivedIntangibleAssetsAmortizationExpenseIncludingLeaseholds_e06d0016-98b1-4fc9-b7bf-ee23f547f4dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_09a993e3-fd6b-46c2-8c4b-c444f7acaf39" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_09a993e3-fd6b-46c2-8c4b-c444f7acaf39" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_5ebd400a-a301-4c69-898e-eb672a35f07f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_5ebd400a-a301-4c69-898e-eb672a35f07f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f8166fa0-180e-44c6-a53f-c629b9e5dff8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_f8166fa0-180e-44c6-a53f-c629b9e5dff8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_89d10302-fbdc-4969-8b78-87501d725373" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_89d10302-fbdc-4969-8b78-87501d725373" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_85f7560e-d272-42f7-92dd-95bce214c7e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_85f7560e-d272-42f7-92dd-95bce214c7e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_bfa4d5b2-8e56-4520-beca-c19370a230a8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_bfa4d5b2-8e56-4520-beca-c19370a230a8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_ae752e00-4d56-4bc7-accc-9023eab4f5b3" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsAxis_3edc923d-d06d-4e58-8873-31b155fb0e6d" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:to="loc_din_TypeOfIntangibleAssetsAxis_3edc923d-d06d-4e58-8873-31b155fb0e6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsDomain_3edc923d-d06d-4e58-8873-31b155fb0e6d_default" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_TypeOfIntangibleAssetsAxis_3edc923d-d06d-4e58-8873-31b155fb0e6d" xlink:to="loc_din_TypeOfIntangibleAssetsDomain_3edc923d-d06d-4e58-8873-31b155fb0e6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TypeOfIntangibleAssetsDomain_4e037afa-88b9-40b9-8170-8dada0a382b5" xlink:href="din-20201231.xsd#din_TypeOfIntangibleAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_TypeOfIntangibleAssetsAxis_3edc923d-d06d-4e58-8873-31b155fb0e6d" xlink:to="loc_din_TypeOfIntangibleAssetsDomain_4e037afa-88b9-40b9-8170-8dada0a382b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IndefiniteLivedIntangibleAssetsMajorClassNameMember_258bb7e5-e57f-4cf5-8c72-97ff7e7e211b" xlink:href="din-20201231.xsd#din_IndefiniteLivedIntangibleAssetsMajorClassNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_TypeOfIntangibleAssetsDomain_4e037afa-88b9-40b9-8170-8dada0a382b5" xlink:to="loc_din_IndefiniteLivedIntangibleAssetsMajorClassNameMember_258bb7e5-e57f-4cf5-8c72-97ff7e7e211b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteLivedIntangibleAssetsMajorClassNameMember_9ca52670-397b-4095-80b9-1e3062ff78ad" xlink:href="din-20201231.xsd#din_FiniteLivedIntangibleAssetsMajorClassNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_TypeOfIntangibleAssetsDomain_4e037afa-88b9-40b9-8170-8dada0a382b5" xlink:to="loc_din_FiniteLivedIntangibleAssetsMajorClassNameMember_9ca52670-397b-4095-80b9-1e3062ff78ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_9f61a998-b11c-47de-b2bf-d5bbba10000f" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_9f61a998-b11c-47de-b2bf-d5bbba10000f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_9f61a998-b11c-47de-b2bf-d5bbba10000f_default" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_9f61a998-b11c-47de-b2bf-d5bbba10000f" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_9f61a998-b11c-47de-b2bf-d5bbba10000f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_240dfdb8-f311-41c0-ad23-74feda66deaa" xlink:href="din-20201231.xsd#din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameAxis_9f61a998-b11c-47de-b2bf-d5bbba10000f" xlink:to="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_240dfdb8-f311-41c0-ad23-74feda66deaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_340c72d4-0a2b-4fdf-88cd-75f00a687e2c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_240dfdb8-f311-41c0-ad23-74feda66deaa" xlink:to="loc_us-gaap_TradeNamesMember_340c72d4-0a2b-4fdf-88cd-75f00a687e2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_010dbff8-7b8a-496c-a54b-890825cb7028" xlink:href="din-20201231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain_240dfdb8-f311-41c0-ad23-74feda66deaa" xlink:to="loc_din_ReacquiredFranchiseRightsMember_010dbff8-7b8a-496c-a54b-890825cb7028" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_51eea013-f5eb-4d4e-a06d-571b0e2f4b65" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_51eea013-f5eb-4d4e-a06d-571b0e2f4b65" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_51eea013-f5eb-4d4e-a06d-571b0e2f4b65_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_51eea013-f5eb-4d4e-a06d-571b0e2f4b65" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_51eea013-f5eb-4d4e-a06d-571b0e2f4b65_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_cb8e86c6-5db0-4cf2-af21-e8d05c06c279" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_51eea013-f5eb-4d4e-a06d-571b0e2f4b65" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_cb8e86c6-5db0-4cf2-af21-e8d05c06c279" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_ec0bd0b9-08cc-4360-a588-009da2d524b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_cb8e86c6-5db0-4cf2-af21-e8d05c06c279" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_ec0bd0b9-08cc-4360-a588-009da2d524b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_792e3801-a51e-42a1-80ec-e3f122e26c79" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_364a9a91-85a2-4134-a63f-ca9bf15efb62" xlink:to="loc_dei_LegalEntityAxis_792e3801-a51e-42a1-80ec-e3f122e26c79" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_792e3801-a51e-42a1-80ec-e3f122e26c79_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_792e3801-a51e-42a1-80ec-e3f122e26c79" xlink:to="loc_dei_EntityDomain_792e3801-a51e-42a1-80ec-e3f122e26c79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a4347e67-a8c0-4305-8984-53bdd014f5a4" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_792e3801-a51e-42a1-80ec-e3f122e26c79" xlink:to="loc_dei_EntityDomain_a4347e67-a8c0-4305-8984-53bdd014f5a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_31855897-cb06-4151-8169-7b4a59ae3881" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a4347e67-a8c0-4305-8984-53bdd014f5a4" xlink:to="loc_din_ApplebeesMember_31855897-cb06-4151-8169-7b4a59ae3881" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails" xlink:type="extended" id="i715327c1533c48d99348e31bf610aef2_OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_42e69b49-9b75-44a9-b5cb-8bceb524d88b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_aebfe5f2-57b6-4e06-b12e-eeb0c91b969a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_42e69b49-9b75-44a9-b5cb-8bceb524d88b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_aebfe5f2-57b6-4e06-b12e-eeb0c91b969a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_7fa9b554-e465-4279-b52e-fc22ca0917b7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_42e69b49-9b75-44a9-b5cb-8bceb524d88b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_7fa9b554-e465-4279-b52e-fc22ca0917b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_a655e9e4-4814-4ac0-8172-cd45c6833615" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_42e69b49-9b75-44a9-b5cb-8bceb524d88b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_a655e9e4-4814-4ac0-8172-cd45c6833615" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6ccd6d6b-d929-44c4-8a7d-e70e4273f76f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_42e69b49-9b75-44a9-b5cb-8bceb524d88b" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6ccd6d6b-d929-44c4-8a7d-e70e4273f76f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1d08de78-f4ee-45be-8c89-3e8bcca26e5c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_6ccd6d6b-d929-44c4-8a7d-e70e4273f76f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1d08de78-f4ee-45be-8c89-3e8bcca26e5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1d08de78-f4ee-45be-8c89-3e8bcca26e5c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1d08de78-f4ee-45be-8c89-3e8bcca26e5c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1d08de78-f4ee-45be-8c89-3e8bcca26e5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cea42893-93cb-435a-a74b-3ec5d6bd0ff0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_1d08de78-f4ee-45be-8c89-3e8bcca26e5c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cea42893-93cb-435a-a74b-3ec5d6bd0ff0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_44daa640-f297-4838-9e13-11f6fb8a064f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cea42893-93cb-435a-a74b-3ec5d6bd0ff0" xlink:to="loc_us-gaap_FranchiseRightsMember_44daa640-f297-4838-9e13-11f6fb8a064f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_3191b4eb-63fd-4d7f-b6f6-4d8bea35649b" xlink:href="din-20201231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cea42893-93cb-435a-a74b-3ec5d6bd0ff0" xlink:to="loc_din_ReacquiredFranchiseRightsMember_3191b4eb-63fd-4d7f-b6f6-4d8bea35649b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_d12249ad-8682-4580-bc59-bb917c216310" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cea42893-93cb-435a-a74b-3ec5d6bd0ff0" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_d12249ad-8682-4580-bc59-bb917c216310" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebt" xlink:type="simple" xlink:href="din-20201231.xsd#LongTermDebt"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebt" xlink:type="extended" id="id9da7847c04c41e2ab14fa76ad85f151_LongTermDebt"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtTables" xlink:type="simple" xlink:href="din-20201231.xsd#LongTermDebtTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtTables" xlink:type="extended" id="i74b32ecc2fe1484d94a2218e5429f4cf_LongTermDebtTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtScheduleofDebtComponentsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LongTermDebtScheduleofDebtComponentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtScheduleofDebtComponentsDetails" xlink:type="extended" id="i8caa82a117944575a55a77f05ffbe474_LongTermDebtScheduleofDebtComponentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes_06b97e3b-ce20-488f-8d7c-711e6631c47e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SeniorNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_SeniorNotes_06b97e3b-ce20-488f-8d7c-711e6631c47e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_a35f3237-fa6f-4ce7-8fad-b584ac690cad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_a35f3237-fa6f-4ce7-8fad-b584ac690cad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_a7e5522a-f083-4603-b0d7-cfb5def794c1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_LongTermDebt_a7e5522a-f083-4603-b0d7-cfb5def794c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_3419ea8b-386c-4f18-a3cc-52be33980e74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_LongTermDebtCurrent_3419ea8b-386c-4f18-a3cc-52be33980e74" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_d1e1021b-0497-49bf-aa5f-dbbb53ee5bd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_d1e1021b-0497-49bf-aa5f-dbbb53ee5bd4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a93ecc21-fb92-4602-af36-3d1f4d61a070" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a93ecc21-fb92-4602-af36-3d1f4d61a070" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b2707118-40ae-44b9-8516-18c52ccd763b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_82054bc9-4315-4d1c-b4b4-65093667f02a" xlink:to="loc_us-gaap_DebtInstrumentTable_b2707118-40ae-44b9-8516-18c52ccd763b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_ad983c57-19a1-4b73-ada5-768945586191" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b2707118-40ae-44b9-8516-18c52ccd763b" xlink:to="loc_us-gaap_DebtInstrumentAxis_ad983c57-19a1-4b73-ada5-768945586191" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ad983c57-19a1-4b73-ada5-768945586191_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_ad983c57-19a1-4b73-ada5-768945586191" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ad983c57-19a1-4b73-ada5-768945586191_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_430bb651-eebc-4e96-adf0-b4e6b3edc2ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_ad983c57-19a1-4b73-ada5-768945586191" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_430bb651-eebc-4e96-adf0-b4e6b3edc2ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_7ec6ed1c-90c4-4fff-8930-eb794683070e" xlink:href="din-20201231.xsd#din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_430bb651-eebc-4e96-adf0-b4e6b3edc2ed" xlink:to="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_7ec6ed1c-90c4-4fff-8930-eb794683070e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_10d5fcf5-7d3d-457e-a030-e8a1c3ae7d4d" xlink:href="din-20201231.xsd#din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_430bb651-eebc-4e96-adf0-b4e6b3edc2ed" xlink:to="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_10d5fcf5-7d3d-457e-a030-e8a1c3ae7d4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_4174a361-b157-4ba0-a42d-6cede696f234" xlink:href="din-20201231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_430bb651-eebc-4e96-adf0-b4e6b3edc2ed" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_4174a361-b157-4ba0-a42d-6cede696f234" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LongTermDebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="extended" id="i3600f1415b4e475b90d0e31c9363cf08_LongTermDebtAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_75f97f24-aaa4-44e1-bfb3-c62ee00d2e27" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_75f97f24-aaa4-44e1-bfb3-c62ee00d2e27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_4c3a91fd-85ae-40fc-8508-c057da477c5f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_4c3a91fd-85ae-40fc-8508-c057da477c5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RatioOfIndebtednessToNetCapital1_d9a6eaa1-a778-4397-ad42-c7b49888066e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RatioOfIndebtednessToNetCapital1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_RatioOfIndebtednessToNetCapital1_d9a6eaa1-a778-4397-ad42-c7b49888066e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentMakeWholePremium_28518a56-0f37-47cf-bc01-194737334e96" xlink:href="din-20201231.xsd#din_DebtInstrumentMakeWholePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtInstrumentMakeWholePremium_28518a56-0f37-47cf-bc01-194737334e96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentAdditionalInterestOnFixedRate_8ef87417-5aff-4e04-b3d8-a43252e1ad1e" xlink:href="din-20201231.xsd#din_DebtInstrumentAdditionalInterestOnFixedRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtInstrumentAdditionalInterestOnFixedRate_8ef87417-5aff-4e04-b3d8-a43252e1ad1e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_18880ee7-53ae-45d6-affe-8fff7bd19475" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentTerm_18880ee7-53ae-45d6-affe-8fff7bd19475" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_9550f36a-0bcb-4fa0-ba81-7cd07eb47a62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_9550f36a-0bcb-4fa0-ba81-7cd07eb47a62" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentNumberOfExtensions_9a3aef88-cfeb-4a8e-9e8c-40ef9deb4b2d" xlink:href="din-20201231.xsd#din_DebtInstrumentNumberOfExtensions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtInstrumentNumberOfExtensions_9a3aef88-cfeb-4a8e-9e8c-40ef9deb4b2d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentExtensionPeriod_69bae738-b6ad-4069-a72d-72ba5331ed5a" xlink:href="din-20201231.xsd#din_DebtInstrumentExtensionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtInstrumentExtensionPeriod_69bae738-b6ad-4069-a72d-72ba5331ed5a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_42e69892-0b9b-4ebd-9337-015ba8468d30" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_42e69892-0b9b-4ebd-9337-015ba8468d30" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_cf0f29bb-9153-424b-b08b-27d38eeb00bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_cf0f29bb-9153-424b-b08b-27d38eeb00bf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatioCashSweepingEvent_de0fc410-047f-4f79-bfaa-50d45f94e70f" xlink:href="din-20201231.xsd#din_DebtServiceCoverageRatioCashSweepingEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtServiceCoverageRatioCashSweepingEvent_de0fc410-047f-4f79-bfaa-50d45f94e70f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatioRapidAmortizationEvent_434afe1b-e174-48e6-99e7-7c7543759175" xlink:href="din-20201231.xsd#din_DebtServiceCoverageRatioRapidAmortizationEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtServiceCoverageRatioRapidAmortizationEvent_434afe1b-e174-48e6-99e7-7c7543759175" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent_4e2c161f-7001-4cc8-b2ab-bad544265465" xlink:href="din-20201231.xsd#din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent_4e2c161f-7001-4cc8-b2ab-bad544265465" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InterestOnlyDebtServiceCoverageRatioDefaultEvent_950f2e0a-bdf1-4ea2-9c15-11ed019b75de" xlink:href="din-20201231.xsd#din_InterestOnlyDebtServiceCoverageRatioDefaultEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_InterestOnlyDebtServiceCoverageRatioDefaultEvent_950f2e0a-bdf1-4ea2-9c15-11ed019b75de" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatio_854ddaa2-56bd-4fac-86f3-22209078525e" xlink:href="din-20201231.xsd#din_DebtServiceCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_DebtServiceCoverageRatio_854ddaa2-56bd-4fac-86f3-22209078525e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f6d40eab-6ec0-4bd7-a67a-77ef95cf1e10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_f6d40eab-6ec0-4bd7-a67a-77ef95cf1e10" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_804e2c23-642f-4892-aa64-79610575f319" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_804e2c23-642f-4892-aa64-79610575f319" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_6af3fe8c-142e-4081-b9d8-116b114d0ff4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_6af3fe8c-142e-4081-b9d8-116b114d0ff4" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LineOfCreditFacilityPercentageOfAdvancesDrawn_115e8e20-ba70-48e1-b663-fade49049fc4" xlink:href="din-20201231.xsd#din_LineOfCreditFacilityPercentageOfAdvancesDrawn"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_LineOfCreditFacilityPercentageOfAdvancesDrawn_115e8e20-ba70-48e1-b663-fade49049fc4" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_55096114-fa28-419d-9d01-1f4f56d324b9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_55096114-fa28-419d-9d01-1f4f56d324b9" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_2ce687be-9ea7-4fb2-9e4a-ec9876885f1f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_2ce687be-9ea7-4fb2-9e4a-ec9876885f1f" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_331fbf22-aded-4210-9ff1-38a9baba78f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_331fbf22-aded-4210-9ff1-38a9baba78f8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_92db92cb-bc4c-490a-8a5b-ece8470ea7a4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_92db92cb-bc4c-490a-8a5b-ece8470ea7a4" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_3bd8308a-515c-4ba1-8668-5131323c6e3b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_3bd8308a-515c-4ba1-8668-5131323c6e3b" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_6a27f4a1-2359-487e-b9ed-095c77f9af5b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_6a27f4a1-2359-487e-b9ed-095c77f9af5b" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_5b615e7b-ce23-41c8-b373-a12f27f1cc92" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_5b615e7b-ce23-41c8-b373-a12f27f1cc92" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CostsIncurredDebt_f469abef-949f-4491-8088-1559de0b6276" xlink:href="din-20201231.xsd#din_CostsIncurredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_din_CostsIncurredDebt_f469abef-949f-4491-8088-1559de0b6276" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_db6d3142-2af1-47bb-94d5-b07fe0cdc51e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_db6d3142-2af1-47bb-94d5-b07fe0cdc51e" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ea82404-9402-48bc-aaf6-2d228b106018" xlink:to="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:to="loc_us-gaap_DebtInstrumentAxis_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_42eb28f4-26e2-4334-a8d7-04dbfc9eb8c5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_a29932d6-b1ce-4f13-9784-0239fdd3d1a9" xlink:href="din-20201231.xsd#din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_a29932d6-b1ce-4f13-9784-0239fdd3d1a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_61e9cf8a-68cc-445d-8084-6204e460d23e" xlink:href="din-20201231.xsd#din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_61e9cf8a-68cc-445d-8084-6204e460d23e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember_0a685b02-1cea-4ed8-ba8c-146b7df40961" xlink:href="din-20201231.xsd#din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember_0a685b02-1cea-4ed8-ba8c-146b7df40961" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_9f258d34-ee9d-4055-b12f-1a57ca559c59" xlink:href="din-20201231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_9f258d34-ee9d-4055-b12f-1a57ca559c59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20181VariableFundingSeniorNotesClassA1Member_7a5803e4-3c7b-4dcf-bdec-4fba74a0c437" xlink:href="din-20201231.xsd#din_Series20181VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series20181VariableFundingSeniorNotesClassA1Member_7a5803e4-3c7b-4dcf-bdec-4fba74a0c437" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20141VariableFundingSeniorNotesClassA1Member_c9557ea0-8ddc-46c2-be22-846ecdccd7b7" xlink:href="din-20201231.xsd#din_Series20141VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_5801aa26-f413-4d4a-a679-7f7105e3f8e9" xlink:to="loc_din_Series20141VariableFundingSeniorNotesClassA1Member_c9557ea0-8ddc-46c2-be22-846ecdccd7b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:to="loc_us-gaap_CreditFacilityAxis_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55" xlink:to="loc_us-gaap_CreditFacilityDomain_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_69dffb25-e84b-47aa-a109-c79ad3944042" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_622c81d6-e1ae-4fe6-a4e7-7a526aa53a55" xlink:to="loc_us-gaap_CreditFacilityDomain_69dffb25-e84b-47aa-a109-c79ad3944042" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_0bcded5d-b962-4cc6-a902-e5925377640a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_69dffb25-e84b-47aa-a109-c79ad3944042" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_0bcded5d-b962-4cc6-a902-e5925377640a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_e6f02195-ea16-4a6e-8d37-c629c0061f2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_69dffb25-e84b-47aa-a109-c79ad3944042" xlink:to="loc_us-gaap_LetterOfCreditMember_e6f02195-ea16-4a6e-8d37-c629c0061f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_83114982-a9b5-42a9-96c5-6d979944feee" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:to="loc_srt_StatementScenarioAxis_83114982-a9b5-42a9-96c5-6d979944feee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_83114982-a9b5-42a9-96c5-6d979944feee_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_83114982-a9b5-42a9-96c5-6d979944feee" xlink:to="loc_srt_ScenarioUnspecifiedDomain_83114982-a9b5-42a9-96c5-6d979944feee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_a559d370-f243-43e1-bc93-ff3f6fba194f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_83114982-a9b5-42a9-96c5-6d979944feee" xlink:to="loc_srt_ScenarioUnspecifiedDomain_a559d370-f243-43e1-bc93-ff3f6fba194f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_fa0982ee-675c-4283-a4f7-d1a8c9bf38dd" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_a559d370-f243-43e1-bc93-ff3f6fba194f" xlink:to="loc_srt_ScenarioForecastMember_fa0982ee-675c-4283-a4f7-d1a8c9bf38dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_a94cf39f-0324-435b-82f3-f2da7329234f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:to="loc_us-gaap_VariableRateAxis_a94cf39f-0324-435b-82f3-f2da7329234f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_a94cf39f-0324-435b-82f3-f2da7329234f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_a94cf39f-0324-435b-82f3-f2da7329234f" xlink:to="loc_us-gaap_VariableRateDomain_a94cf39f-0324-435b-82f3-f2da7329234f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_a94cf39f-0324-435b-82f3-f2da7329234f" xlink:to="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TenYearUnitedStatesTreasuryBillRateMember_2cfe1b71-1716-4918-aaf5-2fd6d0fc374b" xlink:href="din-20201231.xsd#din_TenYearUnitedStatesTreasuryBillRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_din_TenYearUnitedStatesTreasuryBillRateMember_2cfe1b71-1716-4918-aaf5-2fd6d0fc374b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EurodollarMember_a29e6d9f-37e7-40c2-84bb-1cd7270a2eed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EurodollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_us-gaap_EurodollarMember_a29e6d9f-37e7-40c2-84bb-1cd7270a2eed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_1014d499-ccd9-485f-866b-b4b8d4cfb61c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_us-gaap_BaseRateMember_1014d499-ccd9-485f-866b-b4b8d4cfb61c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FederalFundsRateMember_53fbc132-8c54-4848-8671-8d6d7dde69ad" xlink:href="din-20201231.xsd#din_FederalFundsRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_din_FederalFundsRateMember_53fbc132-8c54-4848-8671-8d6d7dde69ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_820dcff1-b228-4a80-805b-45180b92989b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_820dcff1-b228-4a80-805b-45180b92989b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CommercialPaperFundingRateOfConduitInvestorMember_24ad1acf-4bc0-4c17-806c-224337045a0b" xlink:href="din-20201231.xsd#din_CommercialPaperFundingRateOfConduitInvestorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_1307841e-d38f-4ac3-9f92-dc1430a2de30" xlink:to="loc_din_CommercialPaperFundingRateOfConduitInvestorMember_24ad1acf-4bc0-4c17-806c-224337045a0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_cb03603e-960b-4c46-8837-81f499027506" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b0be9219-9180-45f8-b1fa-db09f0d5f008" xlink:to="loc_srt_RangeAxis_cb03603e-960b-4c46-8837-81f499027506" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_cb03603e-960b-4c46-8837-81f499027506_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_cb03603e-960b-4c46-8837-81f499027506" xlink:to="loc_srt_RangeMember_cb03603e-960b-4c46-8837-81f499027506_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_eb41ee1d-6047-4b22-a363-26429af86472" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_cb03603e-960b-4c46-8837-81f499027506" xlink:to="loc_srt_RangeMember_eb41ee1d-6047-4b22-a363-26429af86472" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a6a82023-505b-4f72-8f72-3dac8ffabd76" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_eb41ee1d-6047-4b22-a363-26429af86472" xlink:to="loc_srt_MaximumMember_a6a82023-505b-4f72-8f72-3dac8ffabd76" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtScheduleofMaturitiesofLongTermDebtDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LongTermDebtScheduleofMaturitiesofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtScheduleofMaturitiesofLongTermDebtDetails" xlink:type="extended" id="i47d3d465b5ea4e6584d21cfbcd9a7592_LongTermDebtScheduleofMaturitiesofLongTermDebtDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/FinancingObligations" xlink:type="simple" xlink:href="din-20201231.xsd#FinancingObligations"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/FinancingObligations" xlink:type="extended" id="i33167fd4dec34d70adee49251a62afc8_FinancingObligations"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/FinancingObligationsTables" xlink:type="simple" xlink:href="din-20201231.xsd#FinancingObligationsTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/FinancingObligationsTables" xlink:type="extended" id="i407d0acfc75c4e14960ce087648317a4_FinancingObligationsTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/FinancingObligationsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#FinancingObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/FinancingObligationsDetails" xlink:type="extended" id="i577c2ebb1ec64f98b89ecda32cc011bb_FinancingObligationsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction_702475c8-269c-4d03-8ab1-736caaf0bf36" xlink:href="din-20201231.xsd#din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction_702475c8-269c-4d03-8ab1-736caaf0bf36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionHistoricalCost_04d751b3-22f5-41ad-9516-401837005b4a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionHistoricalCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_us-gaap_SaleLeasebackTransactionHistoricalCost_04d751b3-22f5-41ad-9516-401837005b4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackInitialTerm_69e21949-3358-46c9-8aa6-ede3afae14df" xlink:href="din-20201231.xsd#din_SaleLeasebackInitialTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_SaleLeasebackInitialTerm_69e21949-3358-46c9-8aa6-ede3afae14df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfOptionsToExtendInitialSaleLeasebackTerm_1853e7c0-a041-41b5-bb44-212131e5872b" xlink:href="din-20201231.xsd#din_NumberOfOptionsToExtendInitialSaleLeasebackTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_NumberOfOptionsToExtendInitialSaleLeasebackTerm_1853e7c0-a041-41b5-bb44-212131e5872b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears_bd94f599-0feb-4638-a153-d64e080331c9" xlink:href="din-20201231.xsd#din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears_bd94f599-0feb-4638-a153-d64e080331c9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PropertiesAssignedToFranchiseeOrReleasedFromLessor_0cd32ad9-ee04-4459-a1ae-149789fc2723" xlink:href="din-20201231.xsd#din_PropertiesAssignedToFranchiseeOrReleasedFromLessor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_PropertiesAssignedToFranchiseeOrReleasedFromLessor_0cd32ad9-ee04-4459-a1ae-149789fc2723" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions_f8bc1095-12fb-415c-8cc0-cac8f142f6c3" xlink:href="din-20201231.xsd#din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions_f8bc1095-12fb-415c-8cc0-cac8f142f6c3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_ac1d2f6f-dc6b-4cae-adde-1a7930104610" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_ac1d2f6f-dc6b-4cae-adde-1a7930104610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_7abe729b-4319-4e81-ad29-44eea6c97f80" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_7abe729b-4319-4e81-ad29-44eea6c97f80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_9bcb809b-97cf-4682-9574-767463a0fc43" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_9bcb809b-97cf-4682-9574-767463a0fc43" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_7c4aaed3-49c8-464b-83ba-7dc4f913a88d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_7c4aaed3-49c8-464b-83ba-7dc4f913a88d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_7949d72c-4852-4c6f-ac88-0cba0ef4541c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_7949d72c-4852-4c6f-ac88-0cba0ef4541c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_0c58fe23-1524-4207-b10c-01172d7b289a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_0c58fe23-1524-4207-b10c-01172d7b289a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_1f872c9a-54fe-4549-8532-9d0847b3c408" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_1f872c9a-54fe-4549-8532-9d0847b3c408" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_57c8c6cf-e15b-431c-81c4-3fe98b6f2f32" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_57c8c6cf-e15b-431c-81c4-3fe98b6f2f32" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_f1afca96-c20e-40e8-a93a-d8b3b24301fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiability_f1afca96-c20e-40e8-a93a-d8b3b24301fd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_88ea16e2-6fb9-4510-9787-703a93718fa9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_88ea16e2-6fb9-4510-9787-703a93718fa9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_609b9bdd-2e17-4c7b-9edf-160fbadd4cd9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsAbstract_f72b3f38-270d-4226-91f1-b0ba32b16c13" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_609b9bdd-2e17-4c7b-9edf-160fbadd4cd9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionTable_acddf3fb-1ce6-4ff0-9a1b-ea671b4a9059" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_aba6b2bc-0d99-4b6f-a2a8-6a85edf035f4" xlink:to="loc_us-gaap_SaleLeasebackTransactionTable_acddf3fb-1ce6-4ff0-9a1b-ea671b4a9059" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_a7d39c3f-8718-4742-8ea6-6a5a5e74612a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SaleLeasebackTransactionTable_acddf3fb-1ce6-4ff0-9a1b-ea671b4a9059" xlink:to="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_a7d39c3f-8718-4742-8ea6-6a5a5e74612a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_a7d39c3f-8718-4742-8ea6-6a5a5e74612a_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_a7d39c3f-8718-4742-8ea6-6a5a5e74612a" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_a7d39c3f-8718-4742-8ea6-6a5a5e74612a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_04cba4e6-44f1-43a2-8617-ee9c06795afe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_a7d39c3f-8718-4742-8ea6-6a5a5e74612a" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_04cba4e6-44f1-43a2-8617-ee9c06795afe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackTransactionAgreementForPropertiesMember_caaa1fa9-fe8c-40e7-921b-a2970c169b82" xlink:href="din-20201231.xsd#din_SaleLeasebackTransactionAgreementForPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_04cba4e6-44f1-43a2-8617-ee9c06795afe" xlink:to="loc_din_SaleLeasebackTransactionAgreementForPropertiesMember_caaa1fa9-fe8c-40e7-921b-a2970c169b82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_MasterLeaseAgreementMember_64d5d55c-c09a-4ed3-b55c-bcfe4bbb5500" xlink:href="din-20201231.xsd#din_MasterLeaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_04cba4e6-44f1-43a2-8617-ee9c06795afe" xlink:to="loc_din_MasterLeaseAgreementMember_64d5d55c-c09a-4ed3-b55c-bcfe4bbb5500" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackTransactionsMember_f3f68851-0da5-4455-bc2b-66a191ed7773" xlink:href="din-20201231.xsd#din_SaleLeasebackTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_04cba4e6-44f1-43a2-8617-ee9c06795afe" xlink:to="loc_din_SaleLeasebackTransactionsMember_f3f68851-0da5-4455-bc2b-66a191ed7773" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosures" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosures"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosures" xlink:type="extended" id="i2bc8d07e05424013a29131a6d626cac1_LeaseDisclosures"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresTables" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresTables" xlink:type="extended" id="i5aab2923714a414da9468245e935c075_LeaseDisclosuresTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresNarrativeDetails" xlink:type="extended" id="ie752040560f74362a5e0d3e44d45435e_LeaseDisclosuresNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LesseeNumberofFranchiseeoperatedRestaurants_b1bd0609-5b62-49d0-9054-602e3b344f35" xlink:href="din-20201231.xsd#din_LesseeNumberofFranchiseeoperatedRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_din_LesseeNumberofFranchiseeoperatedRestaurants_b1bd0609-5b62-49d0-9054-602e3b344f35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LessorNumberofPropertiesLeased_9c5d8654-d1cc-4de7-8ff1-143d41eeb7c4" xlink:href="din-20201231.xsd#din_LessorNumberofPropertiesLeased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_din_LessorNumberofPropertiesLeased_9c5d8654-d1cc-4de7-8ff1-143d41eeb7c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties_6d28a0da-c109-4bb3-aa2d-05b2fedea86c" xlink:href="din-20201231.xsd#din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties_6d28a0da-c109-4bb3-aa2d-05b2fedea86c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_5912829e-1c10-49b6-924a-b9426131ede5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_5912829e-1c10-49b6-924a-b9426131ede5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_974f4ace-f130-4f8a-8e98-4703bcdbdb2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_974f4ace-f130-4f8a-8e98-4703bcdbdb2a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_10de4504-d635-4e5b-8392-b0a0a913013e" xlink:href="din-20201231.xsd#din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_10de4504-d635-4e5b-8392-b0a0a913013e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_ea0a0e35-fe5e-46b6-993f-32e3da0ef388" xlink:href="din-20201231.xsd#din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_ea0a0e35-fe5e-46b6-993f-32e3da0ef388" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_6774b728-9542-4f0a-a7e4-6dd5f3e2fa23" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_6774b728-9542-4f0a-a7e4-6dd5f3e2fa23" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_f4690145-e01e-4fc6-8738-4bb7748b2a17" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_f4690145-e01e-4fc6-8738-4bb7748b2a17" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_98937772-0cf4-4098-bc36-bb8d12cd112f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_98937772-0cf4-4098-bc36-bb8d12cd112f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_1efb4b0c-a162-4209-9253-3aa0b74aa68f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_1efb4b0c-a162-4209-9253-3aa0b74aa68f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_4474644d-6d40-4561-89cf-5ae4877b4eba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_234999e7-044a-4eec-9197-efb4ada1af10" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_4474644d-6d40-4561-89cf-5ae4877b4eba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d15cb054-f015-470a-8b94-8b3c80cc70fd" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4474644d-6d40-4561-89cf-5ae4877b4eba" xlink:to="loc_srt_RangeAxis_d15cb054-f015-470a-8b94-8b3c80cc70fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d15cb054-f015-470a-8b94-8b3c80cc70fd_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d15cb054-f015-470a-8b94-8b3c80cc70fd" xlink:to="loc_srt_RangeMember_d15cb054-f015-470a-8b94-8b3c80cc70fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_9b1ad7ac-c538-4c9c-9110-6d062963d70c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d15cb054-f015-470a-8b94-8b3c80cc70fd" xlink:to="loc_srt_RangeMember_9b1ad7ac-c538-4c9c-9110-6d062963d70c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_8c7b264f-fe8c-4e7a-9634-63a60f4c9066" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9b1ad7ac-c538-4c9c-9110-6d062963d70c" xlink:to="loc_srt_MinimumMember_8c7b264f-fe8c-4e7a-9634-63a60f4c9066" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_195556fd-5eca-4c50-83ca-662e84ff572c" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_9b1ad7ac-c538-4c9c-9110-6d062963d70c" xlink:to="loc_srt_MaximumMember_195556fd-5eca-4c50-83ca-662e84ff572c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_10fe48ea-06f7-4c75-8511-2d380e81d8e7" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_4474644d-6d40-4561-89cf-5ae4877b4eba" xlink:to="loc_dei_LegalEntityAxis_10fe48ea-06f7-4c75-8511-2d380e81d8e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_10fe48ea-06f7-4c75-8511-2d380e81d8e7_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_10fe48ea-06f7-4c75-8511-2d380e81d8e7" xlink:to="loc_dei_EntityDomain_10fe48ea-06f7-4c75-8511-2d380e81d8e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0539e563-fae1-4372-80cb-55c16f7aec4c" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_10fe48ea-06f7-4c75-8511-2d380e81d8e7" xlink:to="loc_dei_EntityDomain_0539e563-fae1-4372-80cb-55c16f7aec4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_845fe85a-6011-42cb-8a4b-872096003d9c" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0539e563-fae1-4372-80cb-55c16f7aec4c" xlink:to="loc_din_ApplebeesMember_845fe85a-6011-42cb-8a4b-872096003d9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_795dfa41-15ee-41ea-bead-ad5530b62ff6" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0539e563-fae1-4372-80cb-55c16f7aec4c" xlink:to="loc_din_IhopMember_795dfa41-15ee-41ea-bead-ad5530b62ff6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresComponentsofLeaseCostDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresComponentsofLeaseCostDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresComponentsofLeaseCostDetails" xlink:type="extended" id="i8635c27f71584f7fab0d1f37cdc3b5f3_LeaseDisclosuresComponentsofLeaseCostDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumLeasePaymentsUnderNoncancelableLeasesasLesseeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresFutureMinimumLeasePaymentsUnderNoncancelableLeasesasLesseeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumLeasePaymentsUnderNoncancelableLeasesasLesseeDetails" xlink:type="extended" id="i32042cf4be624e31af6eb37268c9029f_LeaseDisclosuresFutureMinimumLeasePaymentsUnderNoncancelableLeasesasLesseeDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresPaymentforLeasesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresPaymentforLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresPaymentforLeasesDetails" xlink:type="extended" id="ifd361991232f4563a7322300f24c0451_LeaseDisclosuresPaymentforLeasesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresComponentsofLeaseIncomeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresComponentsofLeaseIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresComponentsofLeaseIncomeDetails" xlink:type="extended" id="iad1ced3300ce464bb396f8c16ef4f309_LeaseDisclosuresComponentsofLeaseIncomeDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableOperatingLeasesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableOperatingLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableOperatingLeasesDetails" xlink:type="extended" id="id005215176fb4977bc4dba48166fa23c_LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableOperatingLeasesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresScheduleofIncomeFromDirectFinancingLeasesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresScheduleofIncomeFromDirectFinancingLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresScheduleofIncomeFromDirectFinancingLeasesDetails" xlink:type="extended" id="iae02452422cc411194dc625978037b92_LeaseDisclosuresScheduleofIncomeFromDirectFinancingLeasesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableDirectFinancingLeasesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableDirectFinancingLeasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableDirectFinancingLeasesDetails" xlink:type="extended" id="if7c460c1a8934ddca458a980bd82a5ce_LeaseDisclosuresFutureMinimumPaymentstobeReceivedasLessorUnderNoncancelableDirectFinancingLeasesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="din-20201231.xsd#CommitmentsandContingencies"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CommitmentsandContingencies" xlink:type="extended" id="i556178fc3e414a5fa5a88cc70333beb2_CommitmentsandContingencies"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CommitmentsandContingenciesDetails" xlink:type="extended" id="ibd7537ed849e4b0a8475329d4a98abd5_CommitmentsandContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_f8b80746-ddab-47da-9168-bc0d0231094f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_f8b80746-ddab-47da-9168-bc0d0231094f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_b1f28f4b-5bc7-4198-bc62-57951bbff0d4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_b1f28f4b-5bc7-4198-bc62-57951bbff0d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue_b1468a96-b803-46b3-8f08-607b3b0490b1" xlink:href="din-20201231.xsd#din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:to="loc_din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue_b1468a96-b803-46b3-8f08-607b3b0490b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_204ab988-64df-4910-98c4-6f46a6176284" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_204ab988-64df-4910-98c4-6f46a6176284" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_49928c12-c6d6-4469-a6bc-d8a628f3efc5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_5aa78fb9-6186-4bf6-82e3-b3641c42ad9b" xlink:to="loc_us-gaap_LossContingenciesTable_49928c12-c6d6-4469-a6bc-d8a628f3efc5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_49928c12-c6d6-4469-a6bc-d8a628f3efc5" xlink:to="loc_dei_LegalEntityAxis_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6" xlink:to="loc_dei_EntityDomain_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6e0d53c6-ebc1-4714-81ef-5d6117912efd" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4ae06b10-6d70-4b17-9fc9-f1805f22f1b6" xlink:to="loc_dei_EntityDomain_6e0d53c6-ebc1-4714-81ef-5d6117912efd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_12f79ef8-d7a6-449a-b3e5-a3efa2ec1a94" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6e0d53c6-ebc1-4714-81ef-5d6117912efd" xlink:to="loc_din_ApplebeesMember_12f79ef8-d7a6-449a-b3e5-a3efa2ec1a94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5b6388ec-c765-4775-a8d4-d3f234875128" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_49928c12-c6d6-4469-a6bc-d8a628f3efc5" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5b6388ec-c765-4775-a8d4-d3f234875128" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_5b6388ec-c765-4775-a8d4-d3f234875128_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5b6388ec-c765-4775-a8d4-d3f234875128" xlink:to="loc_us-gaap_LossContingencyNatureDomain_5b6388ec-c765-4775-a8d4-d3f234875128_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_107deb81-317b-4301-8014-6b22af6c5a28" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_5b6388ec-c765-4775-a8d4-d3f234875128" xlink:to="loc_us-gaap_LossContingencyNatureDomain_107deb81-317b-4301-8014-6b22af6c5a28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyLeaseGuaranteeMember_d02c99b1-2a5e-4217-8d99-3cdc073c1f1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyLeaseGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_107deb81-317b-4301-8014-6b22af6c5a28" xlink:to="loc_us-gaap_PropertyLeaseGuaranteeMember_d02c99b1-2a5e-4217-8d99-3cdc073c1f1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_1f10689f-571f-4aca-a7d1-a87cfee5c950" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_49928c12-c6d6-4469-a6bc-d8a628f3efc5" xlink:to="loc_us-gaap_DebtInstrumentAxis_1f10689f-571f-4aca-a7d1-a87cfee5c950" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_1f10689f-571f-4aca-a7d1-a87cfee5c950_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_1f10689f-571f-4aca-a7d1-a87cfee5c950" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_1f10689f-571f-4aca-a7d1-a87cfee5c950_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_83942dcd-f7d4-4781-9964-d489f31bb667" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_1f10689f-571f-4aca-a7d1-a87cfee5c950" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_83942dcd-f7d4-4781-9964-d489f31bb667" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_94e9088b-0af2-44a9-ac0d-c25a860bb483" xlink:href="din-20201231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_83942dcd-f7d4-4781-9964-d489f31bb667" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_94e9088b-0af2-44a9-ac0d-c25a860bb483" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficit" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficit"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficit" xlink:type="extended" id="i42f3125debbe4a6f93588b2f0a768fec_StockholdersDeficit"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitTables" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficitTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitTables" xlink:type="extended" id="i7f588afe86a94e7187a5a45147651434_StockholdersDeficitTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficitNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitNarrativeDetails" xlink:type="extended" id="i6071790f45404f9fa879faec2838fee0_StockholdersDeficitNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_e2c0d412-be13-4d35-bdd4-b68a50c89fa9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_e2c0d412-be13-4d35-bdd4-b68a50c89fa9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_29be2ef7-9776-4f6d-a934-628e7adb4222" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_29be2ef7-9776-4f6d-a934-628e7adb4222" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_03934b37-0f91-43c8-a7d7-de3d4d5e35fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_03934b37-0f91-43c8-a7d7-de3d4d5e35fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_3ca47c91-ec04-4f1a-adb5-71f95b1dee01" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_3ca47c91-ec04-4f1a-adb5-71f95b1dee01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_f1098577-215a-4ed0-a2ed-43c282a22b10" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_839c029a-b1f8-4d46-b10e-14d02b639c12" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_f1098577-215a-4ed0-a2ed-43c282a22b10" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_70b3ba14-54a1-4033-afae-9c9fb7b984d7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_f1098577-215a-4ed0-a2ed-43c282a22b10" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_70b3ba14-54a1-4033-afae-9c9fb7b984d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_70b3ba14-54a1-4033-afae-9c9fb7b984d7_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_70b3ba14-54a1-4033-afae-9c9fb7b984d7" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_70b3ba14-54a1-4033-afae-9c9fb7b984d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_7f620230-4953-40e6-ad6d-7e64896893b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_70b3ba14-54a1-4033-afae-9c9fb7b984d7" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_7f620230-4953-40e6-ad6d-7e64896893b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandFifteenAuthorizationMember_e62a4ea6-ef06-4215-ad74-c5b32900ec71" xlink:href="din-20201231.xsd#din_TwoThousandFifteenAuthorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_7f620230-4953-40e6-ad6d-7e64896893b6" xlink:to="loc_din_TwoThousandFifteenAuthorizationMember_e62a4ea6-ef06-4215-ad74-c5b32900ec71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_f1098577-215a-4ed0-a2ed-43c282a22b10" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb" xlink:to="loc_us-gaap_EquityComponentDomain_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_269f0c90-33ee-4206-82ed-df175f17a71e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_22f4c610-95dd-4d9e-8a11-63fbbbda4dbb" xlink:to="loc_us-gaap_EquityComponentDomain_269f0c90-33ee-4206-82ed-df175f17a71e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_30f31391-a787-4fbe-bde8-0cecec0c61c9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_269f0c90-33ee-4206-82ed-df175f17a71e" xlink:to="loc_us-gaap_TreasuryStockMember_30f31391-a787-4fbe-bde8-0cecec0c61c9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitShareRepurchasesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficitShareRepurchasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitShareRepurchasesDetails" xlink:type="extended" id="i30499ac62ff841b698f6d3d554aca9f7_StockholdersDeficitShareRepurchasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_f6840410-1845-4182-b16b-b51c5fbe1a2a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_f6840410-1845-4182-b16b-b51c5fbe1a2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_9b242f7e-10c1-4dc2-ad2d-23881fbdee23" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_9b242f7e-10c1-4dc2-ad2d-23881fbdee23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CumulativeAmountOfSharesRepurchased_94099c10-4984-4e8a-9ec9-0f9d89bdc270" xlink:href="din-20201231.xsd#din_CumulativeAmountOfSharesRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_din_CumulativeAmountOfSharesRepurchased_94099c10-4984-4e8a-9ec9-0f9d89bdc270" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CumulativePaymentsForRepurchaseOfCommonStock_d359b2e1-1fa7-4a84-b7a2-3a244205cb7a" xlink:href="din-20201231.xsd#din_CumulativePaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_din_CumulativePaymentsForRepurchaseOfCommonStock_d359b2e1-1fa7-4a84-b7a2-3a244205cb7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_984d3eef-66a6-4972-9628-ae10776227ad" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_984d3eef-66a6-4972-9628-ae10776227ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_e593012e-7cad-4807-a3e5-b93744c27b43" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_b9e49543-1099-440a-b109-8f9d654e5f24" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_e593012e-7cad-4807-a3e5-b93744c27b43" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_b17ba415-0693-4c2b-8f91-60745a416894" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_e593012e-7cad-4807-a3e5-b93744c27b43" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_b17ba415-0693-4c2b-8f91-60745a416894" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_b17ba415-0693-4c2b-8f91-60745a416894_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_b17ba415-0693-4c2b-8f91-60745a416894" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_b17ba415-0693-4c2b-8f91-60745a416894_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_7086ddad-e813-4fbd-919d-8abaa2bbf29a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_b17ba415-0693-4c2b-8f91-60745a416894" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_7086ddad-e813-4fbd-919d-8abaa2bbf29a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandNineteenRepurchaseProgramMember_922180be-a542-4001-8e22-49ce347c76b8" xlink:href="din-20201231.xsd#din_TwoThousandNineteenRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_7086ddad-e813-4fbd-919d-8abaa2bbf29a" xlink:to="loc_din_TwoThousandNineteenRepurchaseProgramMember_922180be-a542-4001-8e22-49ce347c76b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OctoberTwoThousandFifteenShareRepurchaseProgramMember_83c6422d-c156-4104-9dc1-ccc3586f1a4b" xlink:href="din-20201231.xsd#din_OctoberTwoThousandFifteenShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_7086ddad-e813-4fbd-919d-8abaa2bbf29a" xlink:to="loc_din_OctoberTwoThousandFifteenShareRepurchaseProgramMember_83c6422d-c156-4104-9dc1-ccc3586f1a4b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitScheduleofDividendsDeclaredDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficitScheduleofDividendsDeclaredDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitScheduleofDividendsDeclaredDetails" xlink:type="extended" id="i4b40ec5a91734ae683226abd0f2ba2bc_StockholdersDeficitScheduleofDividendsDeclaredDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitDividendsDeclaredonCommonStockorInExcessDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockholdersDeficitDividendsDeclaredonCommonStockorInExcessDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitDividendsDeclaredonCommonStockorInExcessDetails" xlink:type="extended" id="i93daedbd77d2403d822c6762a03fd8b9_StockholdersDeficitDividendsDeclaredonCommonStockorInExcessDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems_1e1fdbc4-7a5e-4a12-af4c-467bb9f80a89" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_b1c191f0-0303-49c9-80a7-44fed6b6a460" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_1e1fdbc4-7a5e-4a12-af4c-467bb9f80a89" xlink:to="loc_us-gaap_DividendsCommonStock_b1c191f0-0303-49c9-80a7-44fed6b6a460" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_b15b07a7-2a56-4de6-8161-0fa80bf53614" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_1e1fdbc4-7a5e-4a12-af4c-467bb9f80a89" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_b15b07a7-2a56-4de6-8161-0fa80bf53614" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable_ecf2a9bb-2279-402f-9597-084e96b181fe" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DividendsPayableLineItems_1e1fdbc4-7a5e-4a12-af4c-467bb9f80a89" xlink:to="loc_us-gaap_DividendsPayableTable_ecf2a9bb-2279-402f-9597-084e96b181fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_14365fe1-af64-4039-b42b-a21a4a01d981" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_ecf2a9bb-2279-402f-9597-084e96b181fe" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_14365fe1-af64-4039-b42b-a21a4a01d981" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_14365fe1-af64-4039-b42b-a21a4a01d981_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_14365fe1-af64-4039-b42b-a21a4a01d981" xlink:to="loc_us-gaap_EquityComponentDomain_14365fe1-af64-4039-b42b-a21a4a01d981_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3425b6e3-be9c-4097-8164-96f30f32c47a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_14365fe1-af64-4039-b42b-a21a4a01d981" xlink:to="loc_us-gaap_EquityComponentDomain_3425b6e3-be9c-4097-8164-96f30f32c47a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_f178c52b-d3ff-4921-aae0-946147fe0780" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3425b6e3-be9c-4097-8164-96f30f32c47a" xlink:to="loc_us-gaap_RetainedEarningsMember_f178c52b-d3ff-4921-aae0-946147fe0780" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_f2b05048-aa9a-47e3-9267-2fc62f7b5468" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_3425b6e3-be9c-4097-8164-96f30f32c47a" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_f2b05048-aa9a-47e3-9267-2fc62f7b5468" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureCharges" xlink:type="simple" xlink:href="din-20201231.xsd#LonglivedTangibleAssetImpairmentandClosureCharges"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureCharges" xlink:type="extended" id="i30b08584eba4489280ae2326b23c563b_LonglivedTangibleAssetImpairmentandClosureCharges"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesTables" xlink:type="simple" xlink:href="din-20201231.xsd#LonglivedTangibleAssetImpairmentandClosureChargesTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesTables" xlink:type="extended" id="i0ac314431fe342e9b2bf1d4b9deaba6f_LonglivedTangibleAssetImpairmentandClosureChargesTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LonglivedTangibleAssetImpairmentandClosureChargesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesDetails" xlink:type="extended" id="i67bd968a2e814e849fbef888e04e70a3_LonglivedTangibleAssetImpairmentandClosureChargesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#LonglivedTangibleAssetImpairmentandClosureChargesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LonglivedTangibleAssetImpairmentandClosureChargesNarrativeDetails" xlink:type="extended" id="icfa37318da97438fa7a3d770161545ed_LonglivedTangibleAssetImpairmentandClosureChargesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsSubjectToAssetImpairment_81c9781c-05b4-4ad6-99c5-19fda354953c" xlink:href="din-20201231.xsd#din_NumberOfRestaurantsSubjectToAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_din_NumberOfRestaurantsSubjectToAssetImpairment_81c9781c-05b4-4ad6-99c5-19fda354953c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseImpairmentLoss_61a8516c-f9cc-4e44-831e-5020e606fdef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_us-gaap_OperatingLeaseImpairmentLoss_61a8516c-f9cc-4e44-831e-5020e606fdef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_2874aff0-aa49-48cd-b669-effcad243e15" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_2874aff0-aa49-48cd-b669-effcad243e15" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf_38a7bb15-5339-4fd7-961a-88e223db5292" xlink:href="din-20201231.xsd#din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf_38a7bb15-5339-4fd7-961a-88e223db5292" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringCosts_5864ef71-cd12-4e1c-9507-9704dec6f613" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherRestructuringCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_us-gaap_OtherRestructuringCosts_5864ef71-cd12-4e1c-9507-9704dec6f613" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsSubjectToClosureCharges_c0d08bd3-847a-4498-bf93-1124d05d1575" xlink:href="din-20201231.xsd#din_NumberOfRestaurantsSubjectToClosureCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_din_NumberOfRestaurantsSubjectToClosureCharges_c0d08bd3-847a-4498-bf93-1124d05d1575" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_3edf40fa-5ee8-4210-b54f-6d64fa40f544" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b899ebd1-a1f1-404e-9750-968f3bd52055" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_dei_LegalEntityAxis_b899ebd1-a1f1-404e-9750-968f3bd52055" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b899ebd1-a1f1-404e-9750-968f3bd52055_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b899ebd1-a1f1-404e-9750-968f3bd52055" xlink:to="loc_dei_EntityDomain_b899ebd1-a1f1-404e-9750-968f3bd52055_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5fee4544-5e32-4c11-9f7a-e9b32bc6fe33" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b899ebd1-a1f1-404e-9750-968f3bd52055" xlink:to="loc_dei_EntityDomain_5fee4544-5e32-4c11-9f7a-e9b32bc6fe33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_033e6cd1-7e34-45c0-8ec6-9eb64811914a" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5fee4544-5e32-4c11-9f7a-e9b32bc6fe33" xlink:to="loc_din_ApplebeesMember_033e6cd1-7e34-45c0-8ec6-9eb64811914a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_ce7ffabc-ce8c-46bf-9358-adfaf5f09c9d" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5fee4544-5e32-4c11-9f7a-e9b32bc6fe33" xlink:to="loc_din_IhopMember_ce7ffabc-ce8c-46bf-9358-adfaf5f09c9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_dbe4cb8e-298d-4902-9517-cefd7d39e725" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_dbe4cb8e-298d-4902-9517-cefd7d39e725" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_dbe4cb8e-298d-4902-9517-cefd7d39e725_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_dbe4cb8e-298d-4902-9517-cefd7d39e725" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_dbe4cb8e-298d-4902-9517-cefd7d39e725_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_ded3b4bc-d93b-4194-b383-ebdf9b9bc94e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_dbe4cb8e-298d-4902-9517-cefd7d39e725" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_ded3b4bc-d93b-4194-b383-ebdf9b9bc94e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_5df3ab69-d756-4452-9205-d9a402589669" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_ded3b4bc-d93b-4194-b383-ebdf9b9bc94e" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_5df3ab69-d756-4452-9205-d9a402589669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_7fa9a67b-7154-4668-97f3-e3bd00058737" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_ded3b4bc-d93b-4194-b383-ebdf9b9bc94e" xlink:to="loc_us-gaap_FranchisedUnitsMember_7fa9a67b-7154-4668-97f3-e3bd00058737" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_949de020-b5c2-4c40-96fb-806f9e84676d" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_949de020-b5c2-4c40-96fb-806f9e84676d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_949de020-b5c2-4c40-96fb-806f9e84676d_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_949de020-b5c2-4c40-96fb-806f9e84676d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_949de020-b5c2-4c40-96fb-806f9e84676d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c93975e8-d654-45dc-b7d7-eaef2fd8ac94" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_949de020-b5c2-4c40-96fb-806f9e84676d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c93975e8-d654-45dc-b7d7-eaef2fd8ac94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_2b1ba436-f46f-4c20-8dc6-39f843483591" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c93975e8-d654-45dc-b7d7-eaef2fd8ac94" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_2b1ba436-f46f-4c20-8dc6-39f843483591" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_70af1d4d-5c53-48ba-9495-d4801fe6bba8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_70af1d4d-5c53-48ba-9495-d4801fe6bba8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70af1d4d-5c53-48ba-9495-d4801fe6bba8_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_70af1d4d-5c53-48ba-9495-d4801fe6bba8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_70af1d4d-5c53-48ba-9495-d4801fe6bba8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_81df5feb-07c1-467a-b0b2-33e4316b2276" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_70af1d4d-5c53-48ba-9495-d4801fe6bba8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_81df5feb-07c1-467a-b0b2-33e4316b2276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember_8f3ca225-32c5-4820-b257-19d9e7100fe9" xlink:href="din-20201231.xsd#din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_81df5feb-07c1-467a-b0b2-33e4316b2276" xlink:to="loc_din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember_8f3ca225-32c5-4820-b257-19d9e7100fe9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_b42f4bfd-0b75-4b4d-aa17-5c3135948b99" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_srt_RangeAxis_b42f4bfd-0b75-4b4d-aa17-5c3135948b99" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_b42f4bfd-0b75-4b4d-aa17-5c3135948b99_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_b42f4bfd-0b75-4b4d-aa17-5c3135948b99" xlink:to="loc_srt_RangeMember_b42f4bfd-0b75-4b4d-aa17-5c3135948b99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_397abd3f-3870-44ae-ac03-35cc87cfcc81" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_b42f4bfd-0b75-4b4d-aa17-5c3135948b99" xlink:to="loc_srt_RangeMember_397abd3f-3870-44ae-ac03-35cc87cfcc81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_2f0bcb08-6bf6-4b36-81bc-e81a962e3b74" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_397abd3f-3870-44ae-ac03-35cc87cfcc81" xlink:to="loc_srt_MaximumMember_2f0bcb08-6bf6-4b36-81bc-e81a962e3b74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ba21559d-ff6f-4251-9668-02ccb23302a4" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_397abd3f-3870-44ae-ac03-35cc87cfcc81" xlink:to="loc_srt_MinimumMember_ba21559d-ff6f-4251-9668-02ccb23302a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestaurantConceptAxis_e7a3bdf1-5760-43e3-ac02-30299fe538da" xlink:href="din-20201231.xsd#din_RestaurantConceptAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_7488bb53-826d-49be-a7b7-21ec01b54d00" xlink:to="loc_din_RestaurantConceptAxis_e7a3bdf1-5760-43e3-ac02-30299fe538da" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestaurantConceptDomain_e7a3bdf1-5760-43e3-ac02-30299fe538da_default" xlink:href="din-20201231.xsd#din_RestaurantConceptDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_RestaurantConceptAxis_e7a3bdf1-5760-43e3-ac02-30299fe538da" xlink:to="loc_din_RestaurantConceptDomain_e7a3bdf1-5760-43e3-ac02-30299fe538da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestaurantConceptDomain_dc966a9b-c94c-4c94-9bbe-d18f0c789e91" xlink:href="din-20201231.xsd#din_RestaurantConceptDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_RestaurantConceptAxis_e7a3bdf1-5760-43e3-ac02-30299fe538da" xlink:to="loc_din_RestaurantConceptDomain_dc966a9b-c94c-4c94-9bbe-d18f0c789e91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_932a5f25-8087-4eb2-ab89-b41839893ff8" xlink:href="din-20201231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_RestaurantConceptDomain_dc966a9b-c94c-4c94-9bbe-d18f0c789e91" xlink:to="loc_din_IhopMember_932a5f25-8087-4eb2-ab89-b41839893ff8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IHOPAndApplebeesMember_2b6c51aa-4410-463e-8378-6fba5f256090" xlink:href="din-20201231.xsd#din_IHOPAndApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_RestaurantConceptDomain_dc966a9b-c94c-4c94-9bbe-d18f0c789e91" xlink:to="loc_din_IHOPAndApplebeesMember_2b6c51aa-4410-463e-8378-6fba5f256090" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_a582bdd7-e79d-4545-9c2d-d4c0a9c53ce0" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_RestaurantConceptDomain_dc966a9b-c94c-4c94-9bbe-d18f0c789e91" xlink:to="loc_din_ApplebeesMember_a582bdd7-e79d-4545-9c2d-d4c0a9c53ce0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlans" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlans"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlans" xlink:type="extended" id="i06520592972945888c7c0d5eeea4ba0c_StockBasedIncentivePlans"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansTables" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansTables" xlink:type="extended" id="ia558aee642a44ae0b72e9331645c2563_StockBasedIncentivePlansTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansNarrativeDetails" xlink:type="extended" id="i851830d6348f46f08f1cd2819fdafab7_StockBasedIncentivePlansNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_5dd29193-5825-41b5-bb23-45420cd7120d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_5dd29193-5825-41b5-bb23-45420cd7120d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c633585a-4c2d-458e-b755-aa3c710d4c30" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c633585a-4c2d-458e-b755-aa3c710d4c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_d16606af-444c-4f43-a76f-f70370f711d1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_d16606af-444c-4f43-a76f-f70370f711d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_593fb1ab-bab6-4f3c-972f-6c2a4a3f3872" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_593fb1ab-bab6-4f3c-972f-6c2a4a3f3872" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod_5ea486a7-0205-4608-bf39-ce7ea54dfb0a" xlink:href="din-20201231.xsd#din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod_5ea486a7-0205-4608-bf39-ce7ea54dfb0a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_534805d2-4eba-4a8f-9826-b10d5c57e250" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_534805d2-4eba-4a8f-9826-b10d5c57e250" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_abc86d55-48f4-407d-b597-58358da8f8fd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_abc86d55-48f4-407d-b597-58358da8f8fd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3b93d021-de8b-474f-b9dd-5c81c37e677f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_3b93d021-de8b-474f-b9dd-5c81c37e677f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited_49f2986b-89d4-44ba-9c07-c7ce91cbc2e5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited_49f2986b-89d4-44ba-9c07-c7ce91cbc2e5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_4e3e1181-02fc-4afd-bed1-757ad6706c20" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_4e3e1181-02fc-4afd-bed1-757ad6706c20" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_a6b20363-523f-46fc-bcd8-4fdf872057b6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_a6b20363-523f-46fc-bcd8-4fdf872057b6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_a445a3dc-06f6-49b8-bfa9-d1ae5af9390c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxExpenseFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_a445a3dc-06f6-49b8-bfa9-d1ae5af9390c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_45285ac1-a5e7-4df4-a48a-708c567a7c68" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_45285ac1-a5e7-4df4-a48a-708c567a7c68" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock_27c83dbc-c838-4fe7-9c56-8742fe84c2a9" xlink:href="din-20201231.xsd#din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock_27c83dbc-c838-4fe7-9c56-8742fe84c2a9" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_92f22382-cbcc-47e5-a49f-ca41a988b6b5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_92f22382-cbcc-47e5-a49f-ca41a988b6b5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_7b680ebe-ae60-4c12-a56a-0388e57a2e90" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:to="loc_srt_RangeAxis_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4" xlink:to="loc_srt_RangeMember_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f4653002-73de-4cac-a8ee-abdea808fb21" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5e9eae1a-b7c2-4910-9bf2-624b1035fbf4" xlink:to="loc_srt_RangeMember_f4653002-73de-4cac-a8ee-abdea808fb21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_643a7854-ba1b-4e10-84dd-5fb115bed3f6" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f4653002-73de-4cac-a8ee-abdea808fb21" xlink:to="loc_srt_MinimumMember_643a7854-ba1b-4e10-84dd-5fb115bed3f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_8168260c-e3ce-4f4c-a292-14bfb2a4975f" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f4653002-73de-4cac-a8ee-abdea808fb21" xlink:to="loc_srt_MaximumMember_8168260c-e3ce-4f4c-a292-14bfb2a4975f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_79c73bbb-82a2-4593-8fdb-49883315d0e4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:to="loc_us-gaap_AwardTypeAxis_79c73bbb-82a2-4593-8fdb-49883315d0e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_79c73bbb-82a2-4593-8fdb-49883315d0e4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_79c73bbb-82a2-4593-8fdb-49883315d0e4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_79c73bbb-82a2-4593-8fdb-49883315d0e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_79c73bbb-82a2-4593-8fdb-49883315d0e4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_7cf59f91-e006-4064-a5a2-94ba4e815a73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_us-gaap_EmployeeStockOptionMember_7cf59f91-e006-4064-a5a2-94ba4e815a73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockandRestrictedStockUnitsMember_536642fe-8d49-4540-badd-db6460ec24d6" xlink:href="din-20201231.xsd#din_RestrictedStockandRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_din_RestrictedStockandRestrictedStockUnitsMember_536642fe-8d49-4540-badd-db6460ec24d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_3d488360-b15f-4216-bc10-fec7a2b360bc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_3d488360-b15f-4216-bc10-fec7a2b360bc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f6910ed5-ec1d-4265-822b-3d01844f4b38" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_us-gaap_PerformanceSharesMember_f6910ed5-ec1d-4265-822b-3d01844f4b38" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CashsettledRestrictedStockUnitsMember_a3dcd658-b6a0-42cf-a853-814704a8722a" xlink:href="din-20201231.xsd#din_CashsettledRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_din_CashsettledRestrictedStockUnitsMember_a3dcd658-b6a0-42cf-a853-814704a8722a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LongTermIncentivePlanMember_26431125-4d1f-4d23-a635-bf26a56ba40b" xlink:href="din-20201231.xsd#din_LongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_ad717d1c-689b-4187-a102-d0368f64fcc0" xlink:to="loc_din_LongTermIncentivePlanMember_26431125-4d1f-4d23-a635-bf26a56ba40b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_9bcc1fda-1774-4ce6-ab73-241527b08783" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:to="loc_srt_TitleOfIndividualAxis_9bcc1fda-1774-4ce6-ab73-241527b08783" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9bcc1fda-1774-4ce6-ab73-241527b08783_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_9bcc1fda-1774-4ce6-ab73-241527b08783" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9bcc1fda-1774-4ce6-ab73-241527b08783_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_54f9a742-2b7c-4da5-8cd7-41662c07c015" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_9bcc1fda-1774-4ce6-ab73-241527b08783" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_54f9a742-2b7c-4da5-8cd7-41662c07c015" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OfficersDirectorsandEmployeesMember_02469e0a-ee6d-434e-b139-d2cb5a5dc40e" xlink:href="din-20201231.xsd#din_OfficersDirectorsandEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_54f9a742-2b7c-4da5-8cd7-41662c07c015" xlink:to="loc_din_OfficersDirectorsandEmployeesMember_02469e0a-ee6d-434e-b139-d2cb5a5dc40e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_42a4255c-ed2d-49d3-aac0-602820e15dd4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_d90b93fc-8800-42e8-9e0c-3445caa51113" xlink:to="loc_us-gaap_PlanNameAxis_42a4255c-ed2d-49d3-aac0-602820e15dd4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_42a4255c-ed2d-49d3-aac0-602820e15dd4_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_42a4255c-ed2d-49d3-aac0-602820e15dd4" xlink:to="loc_us-gaap_PlanNameDomain_42a4255c-ed2d-49d3-aac0-602820e15dd4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_86339216-68aa-4066-9e70-58629cf22e22" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_42a4255c-ed2d-49d3-aac0-602820e15dd4" xlink:to="loc_us-gaap_PlanNameDomain_86339216-68aa-4066-9e70-58629cf22e22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandNineteenStockIncentivePlanMember_061a8f45-27b1-495d-8d74-db6f93a4d949" xlink:href="din-20201231.xsd#din_TwoThousandNineteenStockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_86339216-68aa-4066-9e70-58629cf22e22" xlink:to="loc_din_TwoThousandNineteenStockIncentivePlanMember_061a8f45-27b1-495d-8d74-db6f93a4d949" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DineEquityInc.2016StockIncentivePlanMember_b5460d4a-fdf7-43a0-9fec-d1544a1e5933" xlink:href="din-20201231.xsd#din_DineEquityInc.2016StockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_86339216-68aa-4066-9e70-58629cf22e22" xlink:to="loc_din_DineEquityInc.2016StockIncentivePlanMember_b5460d4a-fdf7-43a0-9fec-d1544a1e5933" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DineequityInc2011StockIncentivePlanMember_6af5f89d-f7dc-402d-b45a-1a801214cc16" xlink:href="din-20201231.xsd#din_DineequityInc2011StockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_86339216-68aa-4066-9e70-58629cf22e22" xlink:to="loc_din_DineequityInc2011StockIncentivePlanMember_6af5f89d-f7dc-402d-b45a-1a801214cc16" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansStockBasedCompensationExpenseDetails" xlink:type="extended" id="iec724195de2b4c35afdeb229be55d702_StockBasedIncentivePlansStockBasedCompensationExpenseDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails" xlink:type="extended" id="iabe767526f1d400fa383135bbb422d60_StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansPerformanceBasedValuationAssumptionsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansPerformanceBasedValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansPerformanceBasedValuationAssumptionsDetails" xlink:type="extended" id="ib1366341a3f3415b84d19fac3e53375b_StockBasedIncentivePlansPerformanceBasedValuationAssumptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8c8ab903-815a-4894-b67c-050bef1794bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8c8ab903-815a-4894-b67c-050bef1794bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_d90a9c93-2e30-40ef-9e13-ec58b320eff4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_d90a9c93-2e30-40ef-9e13-ec58b320eff4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_4ce4216c-48cf-4aed-9eca-83a176b6f609" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_4ce4216c-48cf-4aed-9eca-83a176b6f609" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_780b50bd-783d-47a2-bd61-7c42405a0773" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_780b50bd-783d-47a2-bd61-7c42405a0773" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a3cb835b-0424-4a77-8bbb-ced2ccc15f74" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_a3cb835b-0424-4a77-8bbb-ced2ccc15f74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1ac720e2-ea7a-4757-b3c7-568689a9e7ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1ac720e2-ea7a-4757-b3c7-568689a9e7ac" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_27d4e102-bb7f-4773-bd2f-72d6963b7406" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_975a8a81-3c08-43e7-b581-6828490d03b1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_27d4e102-bb7f-4773-bd2f-72d6963b7406" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_27d4e102-bb7f-4773-bd2f-72d6963b7406" xlink:to="loc_us-gaap_AwardTypeAxis_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48bdb72b-d9f3-4a5d-ba1d-88775e6232c4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_fd9da5ed-dbcd-4680-9a1d-4d4b38e43605" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48bdb72b-d9f3-4a5d-ba1d-88775e6232c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PerformanceBasedRestrictedStockUnitsMember_156ebbe5-eea2-4586-a7b2-f44494a89cdb" xlink:href="din-20201231.xsd#din_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48bdb72b-d9f3-4a5d-ba1d-88775e6232c4" xlink:to="loc_din_PerformanceBasedRestrictedStockUnitsMember_156ebbe5-eea2-4586-a7b2-f44494a89cdb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_ea388b63-cfd0-4a64-8f7e-8be1074d1f75" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_48bdb72b-d9f3-4a5d-ba1d-88775e6232c4" xlink:to="loc_us-gaap_PerformanceSharesMember_ea388b63-cfd0-4a64-8f7e-8be1074d1f75" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansStockOptionActivityDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansStockOptionActivityDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansStockOptionActivityDetails" xlink:type="extended" id="i4099a815717d450eb9504874d9f020fb_StockBasedIncentivePlansStockOptionActivityDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails" xlink:type="extended" id="i38b7b4b1269d489f9c04ec377293e0a8_StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bb40e204-6e1e-4cb9-8e1a-092bc2655187" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bb40e204-6e1e-4cb9-8e1a-092bc2655187" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_417630e5-13de-4598-b0ab-b58a6fe0a296" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_417630e5-13de-4598-b0ab-b58a6fe0a296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_dddcf475-b47d-4351-91b7-26ff52df338d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_dddcf475-b47d-4351-91b7-26ff52df338d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod_d6279773-e7a4-418e-9d71-40cb4e2e5aca" xlink:href="din-20201231.xsd#din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:to="loc_din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod_d6279773-e7a4-418e-9d71-40cb4e2e5aca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_0bb67e95-4f0b-44d0-a319-e91b118f5666" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_33a8d9bb-81a5-4888-92f0-49b3360f7a5b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_0bb67e95-4f0b-44d0-a319-e91b118f5666" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_88169d34-1c0b-44e3-a721-084209ba2f12" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bb40e204-6e1e-4cb9-8e1a-092bc2655187" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_256a8634-fe52-405b-a5a6-e67fa0a7162c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_256a8634-fe52-405b-a5a6-e67fa0a7162c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_f0d8a7e7-34b0-4a22-b708-0c2616546840" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_f0d8a7e7-34b0-4a22-b708-0c2616546840" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue_9a02a2c6-a0bf-4b68-9339-71c235b327c8" xlink:href="din-20201231.xsd#din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:to="loc_din_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue_9a02a2c6-a0bf-4b68-9339-71c235b327c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a6e7262e-581a-4d6c-a987-0f06de73f894" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_62f5a20c-2d89-49a4-ade4-963e6486cb81" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_a6e7262e-581a-4d6c-a987-0f06de73f894" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_588673c8-8837-4ae8-ae82-7ca7c612ecc2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8db5b128-f8d0-4f82-bce8-5748eaa16028" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_bb40e204-6e1e-4cb9-8e1a-092bc2655187" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8db5b128-f8d0-4f82-bce8-5748eaa16028" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_98c20163-c7ba-41b5-9f9e-f6cc20ed9638" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_8db5b128-f8d0-4f82-bce8-5748eaa16028" xlink:to="loc_us-gaap_AwardTypeAxis_98c20163-c7ba-41b5-9f9e-f6cc20ed9638" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_98c20163-c7ba-41b5-9f9e-f6cc20ed9638_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_98c20163-c7ba-41b5-9f9e-f6cc20ed9638" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_98c20163-c7ba-41b5-9f9e-f6cc20ed9638_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0164db4a-b5c0-40ac-a10e-a4812d642fac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_98c20163-c7ba-41b5-9f9e-f6cc20ed9638" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0164db4a-b5c0-40ac-a10e-a4812d642fac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_a1ba744a-b5c7-4a17-8fce-1ccf1b2c50ae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0164db4a-b5c0-40ac-a10e-a4812d642fac" xlink:to="loc_us-gaap_RestrictedStockMember_a1ba744a-b5c7-4a17-8fce-1ccf1b2c50ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_e72f93bb-48cf-4e7d-b324-115549f76bf5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0164db4a-b5c0-40ac-a10e-a4812d642fac" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_e72f93bb-48cf-4e7d-b324-115549f76bf5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="din-20201231.xsd#StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails" xlink:type="extended" id="i2133317ff6334b1693ebaeb632c0faf0_StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/EmployeeBenefitPlans" xlink:type="simple" xlink:href="din-20201231.xsd#EmployeeBenefitPlans"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/EmployeeBenefitPlans" xlink:type="extended" id="i22223e9c747c4bb88e38f23eb5d35a57_EmployeeBenefitPlans"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/EmployeeBenefitPlansDetails" xlink:type="simple" xlink:href="din-20201231.xsd#EmployeeBenefitPlansDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/EmployeeBenefitPlansDetails" xlink:type="extended" id="iafb24f87b21d446184c4af801c295065_EmployeeBenefitPlansDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_7d74b287-df44-4f02-9679-b39841448c58" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_2e5dc915-f443-4445-a0ad-920bf7fbbdcb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_7d74b287-df44-4f02-9679-b39841448c58" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_2e5dc915-f443-4445-a0ad-920bf7fbbdcb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EmployeesEligibleCompensationDeferralPercent_60d4b1b1-12ab-4107-af2c-534eccfc9b22" xlink:href="din-20201231.xsd#din_EmployeesEligibleCompensationDeferralPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_7d74b287-df44-4f02-9679-b39841448c58" xlink:to="loc_din_EmployeesEligibleCompensationDeferralPercent_60d4b1b1-12ab-4107-af2c-534eccfc9b22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_d3f2809e-ab1a-4634-94f2-9e58cef05b22" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_7d74b287-df44-4f02-9679-b39841448c58" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_d3f2809e-ab1a-4634-94f2-9e58cef05b22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanTable_592442f2-ae29-4a3f-86f0-7d87e3340ba1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_7d74b287-df44-4f02-9679-b39841448c58" xlink:to="loc_us-gaap_DefinedContributionPlanTable_592442f2-ae29-4a3f-86f0-7d87e3340ba1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_2579deff-ea4b-4974-bf18-cf2545812040" xlink:href="din-20201231.xsd#din_DefinedContributionPensionAndOtherPostretirementPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_592442f2-ae29-4a3f-86f0-7d87e3340ba1" xlink:to="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_2579deff-ea4b-4974-bf18-cf2545812040" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionPlanDomain_2579deff-ea4b-4974-bf18-cf2545812040_default" xlink:href="din-20201231.xsd#din_DefinedContributionPensionPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_2579deff-ea4b-4974-bf18-cf2545812040" xlink:to="loc_din_DefinedContributionPensionPlanDomain_2579deff-ea4b-4974-bf18-cf2545812040_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionPlanDomain_44069561-3f13-464f-84b7-7fa0dd81a7f2" xlink:href="din-20201231.xsd#din_DefinedContributionPensionPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_2579deff-ea4b-4974-bf18-cf2545812040" xlink:to="loc_din_DefinedContributionPensionPlanDomain_44069561-3f13-464f-84b7-7fa0dd81a7f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FirstTierOfEmployeesEligibleCompensationDeferralMember_e1826f06-2eec-4035-9a6a-ae4e61c9012d" xlink:href="din-20201231.xsd#din_FirstTierOfEmployeesEligibleCompensationDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_DefinedContributionPensionPlanDomain_44069561-3f13-464f-84b7-7fa0dd81a7f2" xlink:to="loc_din_FirstTierOfEmployeesEligibleCompensationDeferralMember_e1826f06-2eec-4035-9a6a-ae4e61c9012d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SecondTierOfEmployeesEligibleCompensationDeferralMember_73cdf0c0-4584-4976-9b88-eea8904add5a" xlink:href="din-20201231.xsd#din_SecondTierOfEmployeesEligibleCompensationDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_DefinedContributionPensionPlanDomain_44069561-3f13-464f-84b7-7fa0dd81a7f2" xlink:to="loc_din_SecondTierOfEmployeesEligibleCompensationDeferralMember_73cdf0c0-4584-4976-9b88-eea8904add5a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxes" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxes"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxes" xlink:type="extended" id="i04a75564266d4b018f933736169cd4c2_IncomeTaxes"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesTables" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesTables" xlink:type="extended" id="ic854f11fff34464299bd184075fd1b84_IncomeTaxesTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesProvisionbenefitforincometaxesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesProvisionbenefitforincometaxesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesProvisionbenefitforincometaxesDetails" xlink:type="extended" id="i7247b5cf8e604a56bc8765c12bd1615a_IncomeTaxesProvisionbenefitforincometaxesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesIncometaxratereconciliationDetails" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesIncometaxratereconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesIncometaxratereconciliationDetails" xlink:type="extended" id="idc1b070897e84b26a1c3b7e136040f9c_IncomeTaxesIncometaxratereconciliationDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesIncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesIncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesIncomeTaxesNarrativeDetails" xlink:type="extended" id="id5a498d661164b6a8c7ea51ed48d1100_IncomeTaxesIncomeTaxesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_eda25399-5e1c-42fe-81f6-d650010ee406" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_eda25399-5e1c-42fe-81f6-d650010ee406" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_c37ca450-3038-4979-b99a-26299ae6e061" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses_c37ca450-3038-4979-b99a-26299ae6e061" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_c1531941-e886-4990-b030-09f72b3cc877" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_NumberOfRestaurants_c1531941-e886-4990-b030-09f72b3cc877" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateStateandLocalPercent_c6c6d6f4-13b8-4f24-b765-4bcd057e565e" xlink:href="din-20201231.xsd#din_EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateStateandLocalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_din_EffectiveIncomeTaxRateReconciliationChangeinEnactedTaxRateStateandLocalPercent_c6c6d6f4-13b8-4f24-b765-4bcd057e565e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIncomeTaxRefunds_c8173446-684e-4214-8fce-fa544a8ebf1b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIncomeTaxRefunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_ProceedsFromIncomeTaxRefunds_c8173446-684e-4214-8fce-fa544a8ebf1b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_68ad7821-aef5-4eab-a7cb-569bfb45d7b8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_InterestIncomeOther_68ad7821-aef5-4eab-a7cb-569bfb45d7b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_c23e52bd-fd5a-4785-a5fa-f9636845a676" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_c23e52bd-fd5a-4785-a5fa-f9636845a676" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_9b39d61e-fb21-4144-a9d9-3557f2e1dacf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_OperatingLossCarryforwards_9b39d61e-fb21-4144-a9d9-3557f2e1dacf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_2c881cbf-a04b-4852-afd8-a5c77916cf41" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_2c881cbf-a04b-4852-afd8-a5c77916cf41" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_1b63c962-5e7f-4978-aff9-a3666c4766f9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_1b63c962-5e7f-4978-aff9-a3666c4766f9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_7696737a-5fb9-4dab-99c5-c7a58ae99b6f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_7696737a-5fb9-4dab-99c5-c7a58ae99b6f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_ee2753b4-b87f-4254-b053-3ff7faa57751" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued_ee2753b4-b87f-4254-b053-3ff7faa57751" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExaminationTable_d56fe00d-948e-4b18-a31b-3a91b608bcb5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExaminationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxExaminationLineItems_95da9127-f784-41d9-9e12-9c1faa50455f" xlink:to="loc_us-gaap_IncomeTaxExaminationTable_d56fe00d-948e-4b18-a31b-3a91b608bcb5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d56fe00d-948e-4b18-a31b-3a91b608bcb5" xlink:to="loc_dei_LegalEntityAxis_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6_default" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6" xlink:to="loc_dei_EntityDomain_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1e6ca4c0-a40e-4674-9174-a6920e4f80e2" xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_e3b110b6-d96f-47e8-a1ed-f12c4ceb4ef6" xlink:to="loc_dei_EntityDomain_1e6ca4c0-a40e-4674-9174-a6920e4f80e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_af2b8c8f-e8e7-4b40-9221-b41bd00318d1" xlink:href="din-20201231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1e6ca4c0-a40e-4674-9174-a6920e4f80e2" xlink:to="loc_din_ApplebeesMember_af2b8c8f-e8e7-4b40-9221-b41bd00318d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_6ebf5024-f668-4c36-bbf4-dfdedada69dd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxExaminationTable_d56fe00d-948e-4b18-a31b-3a91b608bcb5" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_6ebf5024-f668-4c36-bbf4-dfdedada69dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_6ebf5024-f668-4c36-bbf4-dfdedada69dd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_6ebf5024-f668-4c36-bbf4-dfdedada69dd" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_6ebf5024-f668-4c36-bbf4-dfdedada69dd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_bea1ae39-c9a1-4323-a61a-259ec074d790" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_6ebf5024-f668-4c36-bbf4-dfdedada69dd" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_bea1ae39-c9a1-4323-a61a-259ec074d790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_9f4ca651-2874-4e28-9089-e4e8732d001a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_bea1ae39-c9a1-4323-a61a-259ec074d790" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_9f4ca651-2874-4e28-9089-e4e8732d001a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesNetdeferredtaxassetsliabilitiesDetails" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesNetdeferredtaxassetsliabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesNetdeferredtaxassetsliabilitiesDetails" xlink:type="extended" id="ib76f682ec3334b95a4aeb5f64195e01a_IncomeTaxesNetdeferredtaxassetsliabilitiesDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/IncomeTaxesReconciliationofunrecognizedtaxbenefitDetails" xlink:type="simple" xlink:href="din-20201231.xsd#IncomeTaxesReconciliationofunrecognizedtaxbenefitDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/IncomeTaxesReconciliationofunrecognizedtaxbenefitDetails" xlink:type="extended" id="i74bf0cf447ce4624a4eaaec8625c7af4_IncomeTaxesReconciliationofunrecognizedtaxbenefitDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/NetLossIncomePerShare" xlink:type="simple" xlink:href="din-20201231.xsd#NetLossIncomePerShare"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/NetLossIncomePerShare" xlink:type="extended" id="i8e3eb2c3b55f4d0b992eec625f984be2_NetLossIncomePerShare"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/NetLossIncomePerShareTables" xlink:type="simple" xlink:href="din-20201231.xsd#NetLossIncomePerShareTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/NetLossIncomePerShareTables" xlink:type="extended" id="i50672d402a12451cbbfcf20945c36dc1_NetLossIncomePerShareTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/NetLossIncomePerShareDetails" xlink:type="simple" xlink:href="din-20201231.xsd#NetLossIncomePerShareDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/NetLossIncomePerShareDetails" xlink:type="extended" id="i13f6cc094e5e4e64925c7e6fb4e96754_NetLossIncomePerShareDetails"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/SegmentReporting" xlink:type="simple" xlink:href="din-20201231.xsd#SegmentReporting"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SegmentReporting" xlink:type="extended" id="ib9551965c9c944ac84dbf11181891ae3_SegmentReporting"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/SegmentReportingTables" xlink:type="simple" xlink:href="din-20201231.xsd#SegmentReportingTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SegmentReportingTables" xlink:type="extended" id="i9cd06d83093f4240872c09451c0b047f_SegmentReportingTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/SegmentReportingDetails" xlink:type="simple" xlink:href="din-20201231.xsd#SegmentReportingDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SegmentReportingDetails" xlink:type="extended" id="i9030aaa858a7473e9fc4cee256e2e80c_SegmentReportingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_72a0ad30-73cc-469c-98c9-65192a248dcd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_72a0ad30-73cc-469c-98c9-65192a248dcd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalIncome_f9b3c05e-024d-4019-9888-b90c4c0dc6b9" xlink:href="din-20201231.xsd#din_RentalIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_din_RentalIncome_f9b3c05e-024d-4019-9888-b90c4c0dc6b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_d434e21d-3ab4-4cb8-bbc5-a00b323296b0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_Revenues_d434e21d-3ab4-4cb8-bbc5-a00b323296b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_de110be7-505e-42f4-a228-c9072fa7dae3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_de110be7-505e-42f4-a228-c9072fa7dae3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_8f311367-3ca8-4630-a661-b9b89ff8bb6a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_InterestExpense_8f311367-3ca8-4630-a661-b9b89ff8bb6a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TotalInterestExpenseForAllSegments_f2b49298-6c94-4bd0-bf21-d5af3b32e4f0" xlink:href="din-20201231.xsd#din_TotalInterestExpenseForAllSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_din_TotalInterestExpenseForAllSegments_f2b49298-6c94-4bd0-bf21-d5af3b32e4f0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_df48c2b0-8f2b-4a1b-9c75-12261f93c993" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_df48c2b0-8f2b-4a1b-9c75-12261f93c993" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment_2fa9db64-4cd3-4b56-bc69-130d1d3e96c9" xlink:href="din-20201231.xsd#din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment_2fa9db64-4cd3-4b56-bc69-130d1d3e96c9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2d615568-569d-4877-bcb4-ab526d8fdfbb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_2d615568-569d-4877-bcb4-ab526d8fdfbb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_79efb8b9-693b-45bc-a301-695e998f8f40" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_Goodwill_79efb8b9-693b-45bc-a301-695e998f8f40" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_b7f58dc0-22d8-4d94-a562-b5f044b488d1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_Assets_b7f58dc0-22d8-4d94-a562-b5f044b488d1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_24bc0e9a-f5eb-4605-871b-7ab6cc96d8d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_779a1dd6-fb24-4e39-9e31-8c9ebee8d2ac" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_24bc0e9a-f5eb-4605-871b-7ab6cc96d8d3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_c97d7a72-995c-4766-8be9-b190f235bfe7" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_24bc0e9a-f5eb-4605-871b-7ab6cc96d8d3" xlink:to="loc_srt_ProductOrServiceAxis_c97d7a72-995c-4766-8be9-b190f235bfe7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c97d7a72-995c-4766-8be9-b190f235bfe7_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_c97d7a72-995c-4766-8be9-b190f235bfe7" xlink:to="loc_srt_ProductsAndServicesDomain_c97d7a72-995c-4766-8be9-b190f235bfe7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_60a9ed06-e95f-400f-82c1-4bb1bca89d69" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_c97d7a72-995c-4766-8be9-b190f235bfe7" xlink:to="loc_srt_ProductsAndServicesDomain_60a9ed06-e95f-400f-82c1-4bb1bca89d69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServiceMember_14e9075f-09c1-4630-be77-837c447ff6f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_60a9ed06-e95f-400f-82c1-4bb1bca89d69" xlink:to="loc_us-gaap_FinancialServiceMember_14e9075f-09c1-4630-be77-837c447ff6f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_24a5acba-9bd3-44bf-9798-ef5782632513" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_60a9ed06-e95f-400f-82c1-4bb1bca89d69" xlink:to="loc_us-gaap_FranchisorMember_24a5acba-9bd3-44bf-9798-ef5782632513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FoodAndBeverageMember_cd3f6280-912c-486b-9e2f-ef2f1d1520cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FoodAndBeverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_60a9ed06-e95f-400f-82c1-4bb1bca89d69" xlink:to="loc_us-gaap_FoodAndBeverageMember_cd3f6280-912c-486b-9e2f-ef2f1d1520cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_bd5d3d58-fc65-439c-9b37-c20753e5a379" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_24bc0e9a-f5eb-4605-871b-7ab6cc96d8d3" xlink:to="loc_srt_ConsolidationItemsAxis_bd5d3d58-fc65-439c-9b37-c20753e5a379" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_bd5d3d58-fc65-439c-9b37-c20753e5a379_default" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_bd5d3d58-fc65-439c-9b37-c20753e5a379" xlink:to="loc_srt_ConsolidationItemsDomain_bd5d3d58-fc65-439c-9b37-c20753e5a379_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_d0b2e562-6d95-4576-802c-966ca7ea7b68" xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_bd5d3d58-fc65-439c-9b37-c20753e5a379" xlink:to="loc_srt_ConsolidationItemsDomain_d0b2e562-6d95-4576-802c-966ca7ea7b68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_894b2c81-d4e4-4bfb-9e67-6e95ef682af7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_d0b2e562-6d95-4576-802c-966ca7ea7b68" xlink:to="loc_us-gaap_OperatingSegmentsMember_894b2c81-d4e4-4bfb-9e67-6e95ef682af7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_82386486-2b2d-48db-936f-a3fd7a307c9c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_d0b2e562-6d95-4576-802c-966ca7ea7b68" xlink:to="loc_us-gaap_CorporateNonSegmentMember_82386486-2b2d-48db-936f-a3fd7a307c9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_008671df-7e21-463a-9f6d-24af4f9041cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_24bc0e9a-f5eb-4605-871b-7ab6cc96d8d3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_008671df-7e21-463a-9f6d-24af4f9041cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_008671df-7e21-463a-9f6d-24af4f9041cf_default" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_008671df-7e21-463a-9f6d-24af4f9041cf" xlink:to="loc_us-gaap_SegmentDomain_008671df-7e21-463a-9f6d-24af4f9041cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_008671df-7e21-463a-9f6d-24af4f9041cf" xlink:to="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseOperationsMember_0028564c-41fd-4aef-b1d1-830643f1f8fa" xlink:href="din-20201231.xsd#din_FranchiseOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:to="loc_din_FranchiseOperationsMember_0028564c-41fd-4aef-b1d1-830643f1f8fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalOperationsMember_dc0903b4-45be-4049-95e4-3cb83964d6df" xlink:href="din-20201231.xsd#din_RentalOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:to="loc_din_RentalOperationsMember_dc0903b4-45be-4049-95e4-3cb83964d6df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CompanyRestaurantsMember_5eddbba2-6628-46e7-a87c-f8e47cdf3c7e" xlink:href="din-20201231.xsd#din_CompanyRestaurantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:to="loc_din_CompanyRestaurantsMember_5eddbba2-6628-46e7-a87c-f8e47cdf3c7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancingOperationsMember_2f10cd61-a088-4aa0-9378-3f8ae31f2200" xlink:href="din-20201231.xsd#din_FinancingOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_218b4ff6-da3a-48bf-a188-655aace19e14" xlink:to="loc_din_FinancingOperationsMember_2f10cd61-a088-4aa0-9378-3f8ae31f2200" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:type="simple" xlink:href="din-20201231.xsd#SelectedQuarterlyFinancialDataUnaudited"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:type="extended" id="if3ec8daedcb448ed97352ffd8aeade78_SelectedQuarterlyFinancialDataUnaudited"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="simple" xlink:href="din-20201231.xsd#SelectedQuarterlyFinancialDataUnauditedTables"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="extended" id="i40374e03aac14afd9e64da9a7428058b_SelectedQuarterlyFinancialDataUnauditedTables"/>
  <link:roleRef roleURI="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="simple" xlink:href="din-20201231.xsd#SelectedQuarterlyFinancialDataUnauditedDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="extended" id="i3d247730fa2043dcad3b06765d0e1a72_SelectedQuarterlyFinancialDataUnauditedDetails"/>
</link:linkbase>
