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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:273c7d0e-791b-418c-8556-45e1cc8b4a7f,g:05f1f69a-c66a-4453-9aef-2e7803662254-->
<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/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="simple" xlink:href="din-20211231.xsd#ConsolidatedStatementsofComprehensiveIncomeLoss"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="extended" id="i5897ec2634654bc3896f6cbb902bde4e_ConsolidatedStatementsofComprehensiveIncomeLoss">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_963d4ca8-cb18-4bf7-978f-e697b8425ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_RevenuesAbstract_963d4ca8-cb18-4bf7-978f-e697b8425ce3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4100ac7c-6db9-421f-8445-489c878289b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_963d4ca8-cb18-4bf7-978f-e697b8425ce3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4100ac7c-6db9-421f-8445-489c878289b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalIncome_1fac1d03-ecc9-4728-b1d7-f2bc14ec9681" xlink:href="din-20211231.xsd#din_RentalIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_963d4ca8-cb18-4bf7-978f-e697b8425ce3" xlink:to="loc_din_RentalIncome_1fac1d03-ecc9-4728-b1d7-f2bc14ec9681" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_2b9b1ba6-8fc1-4fb4-a7ab-ab0482aa3feb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_963d4ca8-cb18-4bf7-978f-e697b8425ce3" xlink:to="loc_us-gaap_Revenues_2b9b1ba6-8fc1-4fb4-a7ab-ab0482aa3feb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfRevenueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_2d209b41-61ae-4cc7-b690-4365abcff51f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_2d209b41-61ae-4cc7-b690-4365abcff51f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_5a5c9b5b-fd31-4317-88ec-e5b212274b21" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_5a5c9b5b-fd31-4317-88ec-e5b212274b21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalFinanceLeaseInterestExpense_3479c09a-495b-444f-b46d-49abfeaa0c24" xlink:href="din-20211231.xsd#din_RentalFinanceLeaseInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_din_RentalFinanceLeaseInterestExpense_3479c09a-495b-444f-b46d-49abfeaa0c24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalExpensesOther_2c2f440c-3514-418b-8f73-3d31c358f458" xlink:href="din-20211231.xsd#din_RentalExpensesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_din_RentalExpensesOther_2c2f440c-3514-418b-8f73-3d31c358f458" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalExpenses_5f59d275-89d0-4391-9336-38b720c68e73" xlink:href="din-20211231.xsd#din_RentalExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_din_RentalExpenses_5f59d275-89d0-4391-9336-38b720c68e73" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingInterestExpense_0a8b144f-9178-4340-b76b-54e1d54af2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_us-gaap_FinancingInterestExpense_0a8b144f-9178-4340-b76b-54e1d54af2a9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_fd8045d1-ff9d-44f4-bf08-5e81e4e3af98" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostOfRevenueAbstract_e5c8e1ec-8314-4384-9ccc-6283e46819ed" xlink:to="loc_us-gaap_CostOfRevenue_fd8045d1-ff9d-44f4-bf08-5e81e4e3af98" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_26672e39-8bf2-4beb-9ebd-7485a2ef29fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_GrossProfit_26672e39-8bf2-4beb-9ebd-7485a2ef29fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_6b690f18-5573-4add-b60d-a26743e22638" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_6b690f18-5573-4add-b60d-a26743e22638" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_1b71fd06-68c3-4c0c-a727-a3d18bc4e727" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_InterestExpenseDebt_1b71fd06-68c3-4c0c-a727-a3d18bc4e727" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetImpairmentCharges_d3a508bf-b0bf-47be-8ac0-6c2cb603c974" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_OtherAssetImpairmentCharges_d3a508bf-b0bf-47be-8ac0-6c2cb603c974" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_e7c17b12-dded-407c-95a7-dd1bff1be78f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_e7c17b12-dded-407c-95a7-dd1bff1be78f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_e2de8d01-668f-41ba-9ece-df83d91402d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_e2de8d01-668f-41ba-9ece-df83d91402d8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_87293183-58aa-4c9a-bbbe-5970aaaea2b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_87293183-58aa-4c9a-bbbe-5970aaaea2b0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cac2f7ad-7413-48a9-bae8-da879522b1f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cac2f7ad-7413-48a9-bae8-da879522b1f9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8642d232-cb51-4a7c-be45-b279588bdf64" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8642d232-cb51-4a7c-be45-b279588bdf64" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a85dbd2a-47be-4b73-aff1-7403a9dab8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_NetIncomeLoss_a85dbd2a-47be-4b73-aff1-7403a9dab8f9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_44aada76-3f09-4dd1-8d5f-0930ebda9366" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_44aada76-3f09-4dd1-8d5f-0930ebda9366" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_03cee4f3-8339-4135-aaad-f68cadee9287" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_44aada76-3f09-4dd1-8d5f-0930ebda9366" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_03cee4f3-8339-4135-aaad-f68cadee9287" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_7b669cd1-0aa7-4b59-bbf6-871694df9e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_44aada76-3f09-4dd1-8d5f-0930ebda9366" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_7b669cd1-0aa7-4b59-bbf6-871694df9e0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_37f927e8-3ff3-4025-9f35-25a4ebc87823" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_37f927e8-3ff3-4025-9f35-25a4ebc87823" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_50f5b5bc-d975-47c9-9f5f-e4da74757078" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_63f500e9-0a98-4348-ad98-62edc8760e69" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_37f927e8-3ff3-4025-9f35-25a4ebc87823" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_63f500e9-0a98-4348-ad98-62edc8760e69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a1ef4678-0cc0-4b71-9dc8-29282a95f21f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_37f927e8-3ff3-4025-9f35-25a4ebc87823" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_a1ef4678-0cc0-4b71-9dc8-29282a95f21f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_e65a312c-cdab-4c49-acf4-534a02243418" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_EarningsPerShareAbstract_e65a312c-cdab-4c49-acf4-534a02243418" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_db9eeba7-b306-47ff-94b8-cf200251b78b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_e65a312c-cdab-4c49-acf4-534a02243418" xlink:to="loc_us-gaap_EarningsPerShareBasic_db9eeba7-b306-47ff-94b8-cf200251b78b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_97d9cc29-3d57-47e6-ac0b-40f8996d61df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_e65a312c-cdab-4c49-acf4-534a02243418" xlink:to="loc_us-gaap_EarningsPerShareDiluted_97d9cc29-3d57-47e6-ac0b-40f8996d61df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_051f73fd-c23c-4d57-9d43-704145d275f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_051f73fd-c23c-4d57-9d43-704145d275f4" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1614594b-bf9e-4aef-896a-0d3cfe36ea0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_051f73fd-c23c-4d57-9d43-704145d275f4" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1614594b-bf9e-4aef-896a-0d3cfe36ea0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_c5c28add-8314-4e21-b8ec-0b982a73ba69" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_051f73fd-c23c-4d57-9d43-704145d275f4" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_c5c28add-8314-4e21-b8ec-0b982a73ba69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_e9eee7d1-4aee-49e5-b83a-1547c2e1f301" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_14b767bb-8eca-4a12-ae9b-593cd5abd732" xlink:to="loc_us-gaap_StatementTable_e9eee7d1-4aee-49e5-b83a-1547c2e1f301" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_035aa649-74db-415e-bf26-5a16bdd3dc1b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_e9eee7d1-4aee-49e5-b83a-1547c2e1f301" xlink:to="loc_srt_ProductOrServiceAxis_035aa649-74db-415e-bf26-5a16bdd3dc1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_035aa649-74db-415e-bf26-5a16bdd3dc1b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_035aa649-74db-415e-bf26-5a16bdd3dc1b" xlink:to="loc_srt_ProductsAndServicesDomain_035aa649-74db-415e-bf26-5a16bdd3dc1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_035aa649-74db-415e-bf26-5a16bdd3dc1b" xlink:to="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_cff185e9-96a5-4904-a384-c7e908b529e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_us-gaap_FranchisorMember_cff185e9-96a5-4904-a384-c7e908b529e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisorRoyaltiesfranchisefeesandotherMember_6b7b2bba-3585-4501-a011-5482ed72800a" xlink:href="din-20211231.xsd#din_FranchisorRoyaltiesfranchisefeesandotherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_cff185e9-96a5-4904-a384-c7e908b529e3" xlink:to="loc_din_FranchisorRoyaltiesfranchisefeesandotherMember_6b7b2bba-3585-4501-a011-5482ed72800a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisorAdvertisingRevenueMember_2a2655c4-f2ae-4395-b780-d47859e61ce4" xlink:href="din-20211231.xsd#din_FranchisorAdvertisingRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_cff185e9-96a5-4904-a384-c7e908b529e3" xlink:to="loc_din_FranchisorAdvertisingRevenueMember_2a2655c4-f2ae-4395-b780-d47859e61ce4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CompanyRestaurantSalesMember_f02d0c4c-dbd1-4f66-86e1-7fd36598a9fa" xlink:href="din-20211231.xsd#din_CompanyRestaurantSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_din_CompanyRestaurantSalesMember_f02d0c4c-dbd1-4f66-86e1-7fd36598a9fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServiceMember_e74e7ff6-8ee4-4454-a3ef-3d63fc2c719b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_us-gaap_FinancialServiceMember_e74e7ff6-8ee4-4454-a3ef-3d63fc2c719b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_d69c3282-be73-4994-ba78-760dc54b38b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdvertisingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_us-gaap_AdvertisingMember_d69c3282-be73-4994-ba78-760dc54b38b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_BadDebtMember_b3635118-392b-49d5-8258-e2b93640b891" xlink:href="din-20211231.xsd#din_BadDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_din_BadDebtMember_b3635118-392b-49d5-8258-e2b93640b891" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseMember_7fb55998-a313-4379-96cc-60c95e39f71b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchiseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_a5ad91c7-c02e-4cd2-ba7e-209aee2676e0" xlink:to="loc_us-gaap_FranchiseMember_7fb55998-a313-4379-96cc-60c95e39f71b" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/ConsolidatedStatementsofStockholdersDeficit" xlink:type="simple" xlink:href="din-20211231.xsd#ConsolidatedStatementsofStockholdersDeficit"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ConsolidatedStatementsofStockholdersDeficit" xlink:type="extended" id="iecdcf2fe7eb04ac39faab2acd6255d9f_ConsolidatedStatementsofStockholdersDeficit">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_4087a78c-36bb-41f2-b76c-4a55e80014a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4087a78c-36bb-41f2-b76c-4a55e80014a7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_cae5fabf-03ad-41ca-ab29-45043d70f03c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_cae5fabf-03ad-41ca-ab29-45043d70f03c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_23f3a839-3f4c-4f74-946d-3412336f7a67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockholdersEquity_23f3a839-3f4c-4f74-946d-3412336f7a67" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_2d1f57e2-ceff-483c-bf43-c921e7636907" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_TreasuryStockShares_2d1f57e2-ceff-483c-bf43-c921e7636907" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList_271be5d6-304f-4c77-87e8-34b4bb898d67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_AccountingStandardsUpdateExtensibleList_271be5d6-304f-4c77-87e8-34b4bb898d67" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_b6b66c87-e7fc-4db1-87f1-41d1e4f8c251" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_NetIncomeLoss_b6b66c87-e7fc-4db1-87f1-41d1e4f8c251" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1261ae11-c198-46db-9122-3d980349e87e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1261ae11-c198-46db-9122-3d980349e87e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_dccfcfe6-1692-4f0b-819f-b7d7afa709b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_dccfcfe6-1692-4f0b-819f-b7d7afa709b0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_61ccc5d3-4c37-4a52-98b7-4c781e410f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_61ccc5d3-4c37-4a52-98b7-4c781e410f5a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_3a7458f2-0a43-49e9-9def-0eb52be349cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_3a7458f2-0a43-49e9-9def-0eb52be349cb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_094f0942-1ce0-487f-b989-d77cb304fe11" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_094f0942-1ce0-487f-b989-d77cb304fe11" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_e62d1dd9-d623-40de-b7ee-6db2dfce1ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_e62d1dd9-d623-40de-b7ee-6db2dfce1ef5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockRepurchasedDuringPeriodShares_502565d1-9d8f-4cd6-b62a-502402199520" xlink:href="din-20211231.xsd#din_RestrictedStockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_din_RestrictedStockRepurchasedDuringPeriodShares_502565d1-9d8f-4cd6-b62a-502402199520" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockRepurchasedDuringPeriodValue_cdc51bb3-9f15-4b00-80dd-b8362266977c" xlink:href="din-20211231.xsd#din_RestrictedStockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_din_RestrictedStockRepurchasedDuringPeriodValue_cdc51bb3-9f15-4b00-80dd-b8362266977c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_54a1a388-ab3b-4e01-9eaa-bdb1a0353964" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_54a1a388-ab3b-4e01-9eaa-bdb1a0353964" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_810182b5-31ec-46b9-9ae0-addf88fe13ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_DividendsCommonStock_810182b5-31ec-46b9-9ae0-addf88fe13ed" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_29ae6c04-e66e-450d-96ab-4048103332d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_9224fa0b-a0a0-45a8-837b-157fe2171404" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_29ae6c04-e66e-450d-96ab-4048103332d9" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_d698f73f-1f11-498a-bad0-b339b82dff06" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_dd1be43a-fc6e-4979-b2f1-902d1ada56a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_d2cd608c-73f9-460f-8eb5-c4b4f5a0fdf6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_29602139-b334-4f38-b9b8-d2793a6a9e56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4087a78c-36bb-41f2-b76c-4a55e80014a7" xlink:to="loc_us-gaap_StatementTable_29602139-b334-4f38-b9b8-d2793a6a9e56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e9d8de3b-b21a-4119-b386-4badef813865" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_29602139-b334-4f38-b9b8-d2793a6a9e56" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e9d8de3b-b21a-4119-b386-4badef813865" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e9d8de3b-b21a-4119-b386-4badef813865_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e9d8de3b-b21a-4119-b386-4badef813865" xlink:to="loc_us-gaap_EquityComponentDomain_e9d8de3b-b21a-4119-b386-4badef813865_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e9d8de3b-b21a-4119-b386-4badef813865" xlink:to="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_da5efbf5-a666-4038-88ac-a6e25974957a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:to="loc_us-gaap_CommonStockMember_da5efbf5-a666-4038-88ac-a6e25974957a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_09f35305-21ef-46fb-8466-5190103e0021" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_09f35305-21ef-46fb-8466-5190103e0021" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_81271bfd-02c4-4bec-bd70-271b5e8edfe7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:to="loc_us-gaap_RetainedEarningsMember_81271bfd-02c4-4bec-bd70-271b5e8edfe7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9a88fa60-da53-4ce8-bad5-0d769e1e2d14" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9a88fa60-da53-4ce8-bad5-0d769e1e2d14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_66706024-8878-4d6b-bfa5-3745dd08dfb2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5c6c5528-b1f8-4d28-968c-5ea43e3c8539" xlink:to="loc_us-gaap_TreasuryStockMember_66706024-8878-4d6b-bfa5-3745dd08dfb2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_29e4162a-dac5-4e90-b9fc-771855b2d042" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_29602139-b334-4f38-b9b8-d2793a6a9e56" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_29e4162a-dac5-4e90-b9fc-771855b2d042" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_29e4162a-dac5-4e90-b9fc-771855b2d042_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_29e4162a-dac5-4e90-b9fc-771855b2d042" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_29e4162a-dac5-4e90-b9fc-771855b2d042_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e2266069-b8fb-47bf-a471-fc572af306f3" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_29e4162a-dac5-4e90-b9fc-771855b2d042" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e2266069-b8fb-47bf-a471-fc572af306f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_c1cf2f6e-0936-4010-89bc-d017dc376f05" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e2266069-b8fb-47bf-a471-fc572af306f3" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_c1cf2f6e-0936-4010-89bc-d017dc376f05" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/TheCompanyDetails" xlink:type="simple" xlink:href="din-20211231.xsd#TheCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/TheCompanyDetails" xlink:type="extended" id="ia27e0d989b5c4c3f9f5333d6d7ab61b8_TheCompanyDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantConcepts_cf375886-b4ba-4080-9003-43fae1f68213" xlink:href="din-20211231.xsd#din_NumberOfRestaurantConcepts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_din_NumberOfRestaurantConcepts_cf375886-b4ba-4080-9003-43fae1f68213" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_e4abc386-aaa2-4157-8609-ea1bbc13557d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_us-gaap_NumberOfRestaurants_e4abc386-aaa2-4157-8609-ea1bbc13557d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfStatesInWhichEntityOperates_d0facedb-c7b2-44cd-898f-6c23727c7da9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfStatesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_us-gaap_NumberOfStatesInWhichEntityOperates_d0facedb-c7b2-44cd-898f-6c23727c7da9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfTerritoriesInWhichEntityOperates_0ca6ee05-e0ef-46f2-a09e-6fcc07ad3176" xlink:href="din-20211231.xsd#din_NumberOfTerritoriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_din_NumberOfTerritoriesInWhichEntityOperates_0ca6ee05-e0ef-46f2-a09e-6fcc07ad3176" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates_b401aa98-9e77-46c8-949b-bf4c9c2d2ab6" xlink:href="din-20211231.xsd#din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates_b401aa98-9e77-46c8-949b-bf4c9c2d2ab6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_cf4addc2-ee9f-4782-91fa-dbef6c504ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFranchisorDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FranchisorDisclosureLineItems_fb449dea-fa65-4b41-a52d-f67178bff11c" xlink:to="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_cf4addc2-ee9f-4782-91fa-dbef6c504ae5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_cd34f7d6-a194-44f3-a93c-f731a934431d" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_cf4addc2-ee9f-4782-91fa-dbef6c504ae5" xlink:to="loc_dei_LegalEntityAxis_cd34f7d6-a194-44f3-a93c-f731a934431d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cd34f7d6-a194-44f3-a93c-f731a934431d_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_cd34f7d6-a194-44f3-a93c-f731a934431d" xlink:to="loc_dei_EntityDomain_cd34f7d6-a194-44f3-a93c-f731a934431d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b7980118-0d5f-4255-9ac3-61a32bc21350" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_cd34f7d6-a194-44f3-a93c-f731a934431d" xlink:to="loc_dei_EntityDomain_b7980118-0d5f-4255-9ac3-61a32bc21350" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_23329c68-a558-4c62-9014-012a5ce546d4" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_b7980118-0d5f-4255-9ac3-61a32bc21350" xlink:to="loc_din_IhopMember_23329c68-a558-4c62-9014-012a5ce546d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_64402491-a906-4b62-aece-c5677a875d0c" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_b7980118-0d5f-4255-9ac3-61a32bc21350" xlink:to="loc_din_ApplebeesMember_64402491-a906-4b62-aece-c5677a875d0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_5169a81c-0f27-45c0-ad4d-d3d06e00dd23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFranchisorDisclosureTable_cf4addc2-ee9f-4782-91fa-dbef6c504ae5" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_5169a81c-0f27-45c0-ad4d-d3d06e00dd23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_5169a81c-0f27-45c0-ad4d-d3d06e00dd23_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_5169a81c-0f27-45c0-ad4d-d3d06e00dd23" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_5169a81c-0f27-45c0-ad4d-d3d06e00dd23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_edeb0918-8ec8-48b5-913b-72c6869e27e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_5169a81c-0f27-45c0-ad4d-d3d06e00dd23" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_edeb0918-8ec8-48b5-913b-72c6869e27e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_2850da44-ef20-4e68-bd58-4c26fe99f1e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_edeb0918-8ec8-48b5-913b-72c6869e27e2" xlink:to="loc_us-gaap_FranchisedUnitsMember_2850da44-ef20-4e68-bd58-4c26fe99f1e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicensingAgreementsMember_8a2cb394-04af-4260-872c-a89bdc60b02d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_edeb0918-8ec8-48b5-913b-72c6869e27e2" xlink:to="loc_us-gaap_LicensingAgreementsMember_8a2cb394-04af-4260-872c-a89bdc60b02d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended" id="ib8de543ac8b1466384f52172d07a3d91_BasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PercentageOfRestaurantsOperatingWithoutGovernmentMandateRestriction_1c8d9397-74cd-4785-b160-02bdd7edfb23" xlink:href="din-20211231.xsd#din_PercentageOfRestaurantsOperatingWithoutGovernmentMandateRestriction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_din_PercentageOfRestaurantsOperatingWithoutGovernmentMandateRestriction_1c8d9397-74cd-4785-b160-02bdd7edfb23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfFranchisees_4e2609e0-0f14-4610-b7c6-63c814c9b19d" xlink:href="din-20211231.xsd#din_NumberOfFranchisees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_din_NumberOfFranchisees_4e2609e0-0f14-4610-b7c6-63c814c9b19d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_8e912f57-fe73-4ba1-8f31-c9c2c61b66e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_NumberOfRestaurants_8e912f57-fe73-4ba1-8f31-c9c2c61b66e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_92b06440-9fe6-46a0-9c18-fd05402cbb09" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_92b06440-9fe6-46a0-9c18-fd05402cbb09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_a18ef0ec-a736-4294-8f16-17598347932b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_AccountsReceivableNet_a18ef0ec-a736-4294-8f16-17598347932b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_88e46367-e11e-45c0-8605-6a009d113612" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_88e46367-e11e-45c0-8605-6a009d113612" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportingUnits_5e6ec569-1499-44a5-bd87-9a795e622d02" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfReportingUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_NumberOfReportingUnits_5e6ec569-1499-44a5-bd87-9a795e622d02" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberofRevenueOperations_8bd85ff1-c5da-41f9-a230-6d306312825e" xlink:href="din-20211231.xsd#din_NumberofRevenueOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_din_NumberofRevenueOperations_8bd85ff1-c5da-41f9-a230-6d306312825e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_77c58b43-e257-4b27-927d-1ea578492b35" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_77c58b43-e257-4b27-927d-1ea578492b35" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_363518ff-d33c-4752-a38f-df04007b06d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_AdvertisingExpense_363518ff-d33c-4752-a38f-df04007b06d8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_a8cbaca1-5bf9-474f-a042-b48a224535e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_NumberOfOperatingSegments_a8cbaca1-5bf9-474f-a042-b48a224535e1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_02daab69-651f-4c9d-b331-7e528accec09" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_NumberOfReportableSegments_02daab69-651f-4c9d-b331-7e528accec09" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfTerritoriesInWhichEntityOperates_954e1f07-4233-4d4c-af51-6f49e6a93117" xlink:href="din-20211231.xsd#din_NumberOfTerritoriesInWhichEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_din_NumberOfTerritoriesInWhichEntityOperates_954e1f07-4233-4d4c-af51-6f49e6a93117" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates_895a7ae2-1bd2-40a7-8764-2a4ba7614856" xlink:href="din-20211231.xsd#din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_din_NumberOfCountriesOutsideTheUnitedStatesInWhichTheEntityOperates_895a7ae2-1bd2-40a7-8764-2a4ba7614856" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_67d8bfeb-8cb0-412c-a2aa-633b93ebb95c" xlink:to="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_85875b54-41b0-44fe-9eaa-aee7a9ad7835" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_dei_LegalEntityAxis_85875b54-41b0-44fe-9eaa-aee7a9ad7835" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_85875b54-41b0-44fe-9eaa-aee7a9ad7835_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_85875b54-41b0-44fe-9eaa-aee7a9ad7835" xlink:to="loc_dei_EntityDomain_85875b54-41b0-44fe-9eaa-aee7a9ad7835_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cc568625-de0e-44ec-9f6b-5bfca8bd472b" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_85875b54-41b0-44fe-9eaa-aee7a9ad7835" xlink:to="loc_dei_EntityDomain_cc568625-de0e-44ec-9f6b-5bfca8bd472b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IHOPAndApplebeesMember_5db73006-3cdb-4bd3-8889-f0bfd24e5243" xlink:href="din-20211231.xsd#din_IHOPAndApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_cc568625-de0e-44ec-9f6b-5bfca8bd472b" xlink:to="loc_din_IHOPAndApplebeesMember_5db73006-3cdb-4bd3-8889-f0bfd24e5243" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_ee4f9667-94fe-4677-a346-c967a298cb80" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_IHOPAndApplebeesMember_5db73006-3cdb-4bd3-8889-f0bfd24e5243" xlink:to="loc_din_ApplebeesMember_ee4f9667-94fe-4677-a346-c967a298cb80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_cd37954f-8ae6-43f1-adbd-e0393d18fc1e" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_IHOPAndApplebeesMember_5db73006-3cdb-4bd3-8889-f0bfd24e5243" xlink:to="loc_din_IhopMember_cd37954f-8ae6-43f1-adbd-e0393d18fc1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_ade9180c-b816-4822-86e7-ce0a9c65540b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_srt_StatementGeographicalAxis_ade9180c-b816-4822-86e7-ce0a9c65540b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ade9180c-b816-4822-86e7-ce0a9c65540b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_ade9180c-b816-4822-86e7-ce0a9c65540b" xlink:to="loc_srt_SegmentGeographicalDomain_ade9180c-b816-4822-86e7-ce0a9c65540b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_e398fc9e-9118-43fe-9558-881b13d4645d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_ade9180c-b816-4822-86e7-ce0a9c65540b" xlink:to="loc_srt_SegmentGeographicalDomain_e398fc9e-9118-43fe-9558-881b13d4645d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_ad43a1d7-505c-4df7-9fd2-42d307b20e88" xlink:href="https://xbrl.sec.gov/country/2021/country-2021.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e398fc9e-9118-43fe-9558-881b13d4645d" xlink:to="loc_country_US_ad43a1d7-505c-4df7-9fd2-42d307b20e88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_8865e1b4-e5d7-4e4d-a16d-95d23f3922d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_e398fc9e-9118-43fe-9558-881b13d4645d" xlink:to="loc_us-gaap_NonUsMember_8865e1b4-e5d7-4e4d-a16d-95d23f3922d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_b15d0eea-a815-4858-a470-c343221ecd5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_b15d0eea-a815-4858-a470-c343221ecd5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_b15d0eea-a815-4858-a470-c343221ecd5f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_b15d0eea-a815-4858-a470-c343221ecd5f" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_b15d0eea-a815-4858-a470-c343221ecd5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_5082a8d5-00a1-44fb-980a-d811584e4016" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_b15d0eea-a815-4858-a470-c343221ecd5f" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_5082a8d5-00a1-44fb-980a-d811584e4016" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromRightsConcentrationRiskMember_57eb4e64-c72b-4457-9e8c-87549c49982f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromRightsConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_5082a8d5-00a1-44fb-980a-d811584e4016" xlink:to="loc_us-gaap_RevenueFromRightsConcentrationRiskMember_57eb4e64-c72b-4457-9e8c-87549c49982f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_bb759091-6d01-49b3-a0f6-5c2185417b8b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_bb759091-6d01-49b3-a0f6-5c2185417b8b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_bb759091-6d01-49b3-a0f6-5c2185417b8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_bb759091-6d01-49b3-a0f6-5c2185417b8b" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_bb759091-6d01-49b3-a0f6-5c2185417b8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_362e4906-df7e-4e98-a0e7-e1511d313988" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_bb759091-6d01-49b3-a0f6-5c2185417b8b" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_362e4906-df7e-4e98-a0e7-e1511d313988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_73a85408-b8a4-4b78-803f-e8a7d7bf2e49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_362e4906-df7e-4e98-a0e7-e1511d313988" xlink:to="loc_us-gaap_SalesRevenueNetMember_73a85408-b8a4-4b78-803f-e8a7d7bf2e49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_f7faeee6-a0b4-4e0d-a27d-c6bd535f49a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_362e4906-df7e-4e98-a0e7-e1511d313988" xlink:to="loc_us-gaap_AccountsReceivableMember_f7faeee6-a0b4-4e0d-a27d-c6bd535f49a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_2394a872-12b5-40cd-97ec-d8113ce0bf96" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_srt_MajorCustomersAxis_2394a872-12b5-40cd-97ec-d8113ce0bf96" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_2394a872-12b5-40cd-97ec-d8113ce0bf96_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_2394a872-12b5-40cd-97ec-d8113ce0bf96" xlink:to="loc_srt_NameOfMajorCustomerDomain_2394a872-12b5-40cd-97ec-d8113ce0bf96_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_e0abd27c-1ccf-4e6e-8756-abcf398d7a88" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_2394a872-12b5-40cd-97ec-d8113ce0bf96" xlink:to="loc_srt_NameOfMajorCustomerDomain_e0abd27c-1ccf-4e6e-8756-abcf398d7a88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseeOneMember_91ffba29-8368-4b38-9933-5ad6cf5060f5" xlink:href="din-20211231.xsd#din_FranchiseeOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_e0abd27c-1ccf-4e6e-8756-abcf398d7a88" xlink:to="loc_din_FranchiseeOneMember_91ffba29-8368-4b38-9933-5ad6cf5060f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_169d553f-09e1-4854-b0e5-d2c4c48fe6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_169d553f-09e1-4854-b0e5-d2c4c48fe6fe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_169d553f-09e1-4854-b0e5-d2c4c48fe6fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_169d553f-09e1-4854-b0e5-d2c4c48fe6fe" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_169d553f-09e1-4854-b0e5-d2c4c48fe6fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_169d553f-09e1-4854-b0e5-d2c4c48fe6fe" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LargestFranchiseesMember_6d2f0ee2-eb42-4fdd-aea5-e82ec044afaf" xlink:href="din-20211231.xsd#din_LargestFranchiseesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:to="loc_din_LargestFranchiseesMember_6d2f0ee2-eb42-4fdd-aea5-e82ec044afaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_d3e580ab-9d8c-4fa8-9607-29bc1c755f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:to="loc_us-gaap_FranchisedUnitsMember_d3e580ab-9d8c-4fa8-9607-29bc1c755f0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchisedUnitsOrLicensingAgreementsMember_bdaa9bee-87ed-4225-902f-b95be440b17f" xlink:href="din-20211231.xsd#din_FranchisedUnitsOrLicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:to="loc_din_FranchisedUnitsOrLicensingAgreementsMember_bdaa9bee-87ed-4225-902f-b95be440b17f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_ac593771-4603-4b64-b5a3-215ae9d9f0ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_6009123a-c667-44dd-8292-ad05df9095c8" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_ac593771-4603-4b64-b5a3-215ae9d9f0ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_0a8a0361-384a-41e5-bd97-7ee4c20015a9" xlink:to="loc_srt_ProductOrServiceAxis_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e" xlink:to="loc_srt_ProductsAndServicesDomain_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5c4305a1-8245-4143-b83f-4c38026e9e15" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_5cb4ef9d-eaa4-4947-87a2-fc21d49f995e" xlink:to="loc_srt_ProductsAndServicesDomain_5c4305a1-8245-4143-b83f-4c38026e9e15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_GiftCardBreakageRevenueMember_2f5de5ea-5ae2-4cd1-a487-a7b5b08b0242" xlink:href="din-20211231.xsd#din_GiftCardBreakageRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5c4305a1-8245-4143-b83f-4c38026e9e15" xlink:to="loc_din_GiftCardBreakageRevenueMember_2f5de5ea-5ae2-4cd1-a487-a7b5b08b0242" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails" xlink:type="extended" id="i0a52a2b792f64f0eb71584c3c25d0182_BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofCashandCashEquivalentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_519522e1-ac79-4bef-b044-45773517e7c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_3fe15ebd-d0f8-449d-8190-d7ba8b901219" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_519522e1-ac79-4bef-b044-45773517e7c0" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_3fe15ebd-d0f8-449d-8190-d7ba8b901219" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_d22972c9-b305-443d-b9b6-6965b5ece4ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_519522e1-ac79-4bef-b044-45773517e7c0" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_d22972c9-b305-443d-b9b6-6965b5ece4ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_0e6bc820-6c0c-480a-8662-22ee707d5f94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_d22972c9-b305-443d-b9b6-6965b5ece4ac" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_0e6bc820-6c0c-480a-8662-22ee707d5f94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0e6bc820-6c0c-480a-8662-22ee707d5f94_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_0e6bc820-6c0c-480a-8662-22ee707d5f94" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0e6bc820-6c0c-480a-8662-22ee707d5f94_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_fb525b64-065c-4c90-8aa3-b1c9092131fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_0e6bc820-6c0c-480a-8662-22ee707d5f94" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_fb525b64-065c-4c90-8aa3-b1c9092131fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_c4528c34-90fd-4450-a991-935e576d74a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_fb525b64-065c-4c90-8aa3-b1c9092131fc" xlink:to="loc_us-gaap_MoneyMarketFundsMember_c4528c34-90fd-4450-a991-935e576d74a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PrepaidAdvertisingandGiftCardsMember_e4a7b998-bd7a-4920-95c6-0067c3373114" xlink:href="din-20211231.xsd#din_PrepaidAdvertisingandGiftCardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_fb525b64-065c-4c90-8aa3-b1c9092131fc" xlink:to="loc_din_PrepaidAdvertisingandGiftCardsMember_e4a7b998-bd7a-4920-95c6-0067c3373114" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherDepositoryAccountsMember_20422ad5-52c5-44d2-8dac-3c3c2896b571" xlink:href="din-20211231.xsd#din_OtherDepositoryAccountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_fb525b64-065c-4c90-8aa3-b1c9092131fc" xlink:to="loc_din_OtherDepositoryAccountsMember_20422ad5-52c5-44d2-8dac-3c3c2896b571" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails" xlink:type="simple" xlink:href="din-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails" xlink:type="extended" id="i29b25d648760400292062872b9911c85_BasisofPresentationandSummaryofSignificantAccountingPoliciesComponentsofRestrictedCashDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_3c80c1bc-f020-4229-b94f-aa5f61fef76c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_f7362a10-f6cc-4a54-9cd3-698178f12771" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_3c80c1bc-f020-4229-b94f-aa5f61fef76c" xlink:to="loc_us-gaap_RestrictedCashCurrent_f7362a10-f6cc-4a54-9cd3-698178f12771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_dee1eb22-3c98-45f9-8ad4-edafe807aae9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_3c80c1bc-f020-4229-b94f-aa5f61fef76c" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_dee1eb22-3c98-45f9-8ad4-edafe807aae9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_0e86ded7-f4d4-46d8-bfcb-d1be613c668d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_dee1eb22-3c98-45f9-8ad4-edafe807aae9" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_0e86ded7-f4d4-46d8-bfcb-d1be613c668d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0e86ded7-f4d4-46d8-bfcb-d1be613c668d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_0e86ded7-f4d4-46d8-bfcb-d1be613c668d" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_0e86ded7-f4d4-46d8-bfcb-d1be613c668d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_7b21ae5a-0d48-4bee-bcca-0b3936dcfeb3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_0e86ded7-f4d4-46d8-bfcb-d1be613c668d" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_7b21ae5a-0d48-4bee-bcca-0b3936dcfeb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SecuritizedDebtReservesMember_08b76e15-017f-4dfe-a205-feb347e3bc01" xlink:href="din-20211231.xsd#din_SecuritizedDebtReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_7b21ae5a-0d48-4bee-bcca-0b3936dcfeb3" xlink:to="loc_din_SecuritizedDebtReservesMember_08b76e15-017f-4dfe-a205-feb347e3bc01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AdvertisingFundsMember_7f5903ff-90aa-405d-8138-d6aaa9647e82" xlink:href="din-20211231.xsd#din_AdvertisingFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_7b21ae5a-0d48-4bee-bcca-0b3936dcfeb3" xlink:to="loc_din_AdvertisingFundsMember_7f5903ff-90aa-405d-8138-d6aaa9647e82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherRestrictedCashCurrentMember_4c4640c4-be48-4054-a82f-d79448823992" xlink:href="din-20211231.xsd#din_OtherRestrictedCashCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_7b21ae5a-0d48-4bee-bcca-0b3936dcfeb3" xlink:to="loc_din_OtherRestrictedCashCurrentMember_4c4640c4-be48-4054-a82f-d79448823992" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesGeneralRangeofDepreciableandAmortizablePropertyandEquipmentLivesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesGeneralRangeofDepreciableandAmortizablePropertyandEquipmentLivesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesGeneralRangeofDepreciableandAmortizablePropertyandEquipmentLivesDetails" xlink:type="extended" id="i577d5944e3a14ead9877d74a4d78f4d1_BasisofPresentationandSummaryofSignificantAccountingPoliciesGeneralRangeofDepreciableandAmortizablePropertyandEquipmentLivesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_04636473-0c2a-4cf9-b939-c49bf944c633" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_5f1e8efc-57b8-44c1-967f-b0168c165cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_04636473-0c2a-4cf9-b939-c49bf944c633" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_5f1e8efc-57b8-44c1-967f-b0168c165cf9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7a84bb90-d2f1-4b8d-bc8f-d7f2aba715fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_04636473-0c2a-4cf9-b939-c49bf944c633" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7a84bb90-d2f1-4b8d-bc8f-d7f2aba715fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a9325ea6-65dc-4958-9962-a6a4b3776696" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7a84bb90-d2f1-4b8d-bc8f-d7f2aba715fc" xlink:to="loc_srt_RangeAxis_a9325ea6-65dc-4958-9962-a6a4b3776696" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a9325ea6-65dc-4958-9962-a6a4b3776696_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a9325ea6-65dc-4958-9962-a6a4b3776696" xlink:to="loc_srt_RangeMember_a9325ea6-65dc-4958-9962-a6a4b3776696_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f7e2f4a3-4fea-4bc1-9e16-009ea655743b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a9325ea6-65dc-4958-9962-a6a4b3776696" xlink:to="loc_srt_RangeMember_f7e2f4a3-4fea-4bc1-9e16-009ea655743b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_89cb40af-2fcf-468a-8d2d-14b1eab10f44" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f7e2f4a3-4fea-4bc1-9e16-009ea655743b" xlink:to="loc_srt_MinimumMember_89cb40af-2fcf-468a-8d2d-14b1eab10f44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_30bfc004-6454-4856-aa47-c48f42213981" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f7e2f4a3-4fea-4bc1-9e16-009ea655743b" xlink:to="loc_srt_MaximumMember_30bfc004-6454-4856-aa47-c48f42213981" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bcee7563-6b92-4717-b9ae-8c9e314043ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_7a84bb90-d2f1-4b8d-bc8f-d7f2aba715fc" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bcee7563-6b92-4717-b9ae-8c9e314043ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_bcee7563-6b92-4717-b9ae-8c9e314043ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bcee7563-6b92-4717-b9ae-8c9e314043ad" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_bcee7563-6b92-4717-b9ae-8c9e314043ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_bcee7563-6b92-4717-b9ae-8c9e314043ad" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_b29d708d-9524-47e8-9963-ed58053dce88" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_b29d708d-9524-47e8-9963-ed58053dce88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_8681307f-090e-4bae-9566-79048d2c591e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:to="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_8681307f-090e-4bae-9566-79048d2c591e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentAndFixturesMember_90280d3f-5c0c-4166-a379-a93b9444b69e" xlink:href="din-20211231.xsd#din_EquipmentAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:to="loc_din_EquipmentAndFixturesMember_90280d3f-5c0c-4166-a379-a93b9444b69e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InternalUseSoftwareMember_0a09e02e-798a-4b47-9e5c-c115d5580e49" xlink:href="din-20211231.xsd#din_InternalUseSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_89cc3f30-7687-41e4-b4ef-6a4466c8af1d" xlink:to="loc_din_InternalUseSoftwareMember_0a09e02e-798a-4b47-9e5c-c115d5580e49" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails" xlink:type="extended" id="i4a97cd00279e464b8ca99a0a10288c8e_BasisofPresentationandSummaryofSignificantAccountingPoliciesFairValueofFinancialInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2df6533b-da95-4836-a1e4-c9e51c1f36e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_e948afc1-cbfa-4981-8359-44ccc22afdae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2df6533b-da95-4836-a1e4-c9e51c1f36e4" xlink:to="loc_us-gaap_LongTermDebtFairValue_e948afc1-cbfa-4981-8359-44ccc22afdae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d7f04d8c-0477-45a6-b901-ed70e81292fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_2df6533b-da95-4836-a1e4-c9e51c1f36e4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d7f04d8c-0477-45a6-b901-ed70e81292fb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_af4f0a33-102c-44ee-bf39-dc46be883da0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d7f04d8c-0477-45a6-b901-ed70e81292fb" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_af4f0a33-102c-44ee-bf39-dc46be883da0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_af4f0a33-102c-44ee-bf39-dc46be883da0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_af4f0a33-102c-44ee-bf39-dc46be883da0" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_af4f0a33-102c-44ee-bf39-dc46be883da0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18aa868b-36bd-4f08-b5e7-18925a123086" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_af4f0a33-102c-44ee-bf39-dc46be883da0" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18aa868b-36bd-4f08-b5e7-18925a123086" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_7cefbe2f-c564-4919-8fd2-d6edc9c72d22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18aa868b-36bd-4f08-b5e7-18925a123086" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_7cefbe2f-c564-4919-8fd2-d6edc9c72d22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_c7d6a534-ad19-4b69-97d5-655f56730e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_7cefbe2f-c564-4919-8fd2-d6edc9c72d22" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_c7d6a534-ad19-4b69-97d5-655f56730e3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e50f06fc-705f-403e-afb4-e213acf90a85" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_7cefbe2f-c564-4919-8fd2-d6edc9c72d22" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_e50f06fc-705f-403e-afb4-e213acf90a85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d7f04d8c-0477-45a6-b901-ed70e81292fb" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b575dad5-6c7b-4290-8647-257e244e4846" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_ce47ed1e-5dd0-43d1-9afe-333ab28bd5ab" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b575dad5-6c7b-4290-8647-257e244e4846" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_ba760e51-00f9-484b-88a5-5b632214195b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b575dad5-6c7b-4290-8647-257e244e4846" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_ba760e51-00f9-484b-88a5-5b632214195b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails" xlink:type="extended" id="ib55c6e769a8b4d86ba47463b887f0df4_RevenueDisclosuresDisaggregationofFranchiseRevenuebyMajorTypeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_1a1eb30d-6b11-4d49-b54c-0458fa101aee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_644ebef7-bd10-4f34-815a-c73b3ab86453" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_1a1eb30d-6b11-4d49-b54c-0458fa101aee" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_644ebef7-bd10-4f34-815a-c73b3ab86453" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_c5ba2515-49fd-471e-ab51-e5ad9bf26bf1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_1a1eb30d-6b11-4d49-b54c-0458fa101aee" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_c5ba2515-49fd-471e-ab51-e5ad9bf26bf1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_84c5b21f-c6df-4513-a637-392206dab423" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_c5ba2515-49fd-471e-ab51-e5ad9bf26bf1" xlink:to="loc_srt_ProductOrServiceAxis_84c5b21f-c6df-4513-a637-392206dab423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_84c5b21f-c6df-4513-a637-392206dab423_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_84c5b21f-c6df-4513-a637-392206dab423" xlink:to="loc_srt_ProductsAndServicesDomain_84c5b21f-c6df-4513-a637-392206dab423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9d40ff9b-d412-4a6a-83e7-e5af37459efb" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_84c5b21f-c6df-4513-a637-392206dab423" xlink:to="loc_srt_ProductsAndServicesDomain_9d40ff9b-d412-4a6a-83e7-e5af37459efb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9d40ff9b-d412-4a6a-83e7-e5af37459efb" xlink:to="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RoyaltiesMember_0af80382-298a-48b0-9aaa-0d792e0512a3" xlink:href="din-20211231.xsd#din_RoyaltiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:to="loc_din_RoyaltiesMember_0af80382-298a-48b0-9aaa-0d792e0512a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_5bd005cf-ad78-4141-a1a2-80c4a7ea3863" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdvertisingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:to="loc_us-gaap_AdvertisingMember_5bd005cf-ad78-4141-a1a2-80c4a7ea3863" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PancakeAndWaffleDryMixMember_c049024c-5877-49cb-b99a-ae2b55b0125e" xlink:href="din-20211231.xsd#din_PancakeAndWaffleDryMixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:to="loc_din_PancakeAndWaffleDryMixMember_c049024c-5877-49cb-b99a-ae2b55b0125e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseAndDevelopmentFeesMember_cdfbd68b-b1c5-4f6a-beca-3c2fb7ba0239" xlink:href="din-20211231.xsd#din_FranchiseAndDevelopmentFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorMember_256bcb6e-6ace-4131-8747-2dbc32f35e29" xlink:to="loc_din_FranchiseAndDevelopmentFeesMember_cdfbd68b-b1c5-4f6a-beca-3c2fb7ba0239" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#RevenueDisclosuresNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresNarrativeDetails" xlink:type="extended" id="id0dd4100133f424e80a28b2f6f317f04_RevenueDisclosuresNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_04e03ab8-f2ca-4cd7-92d2-55d184a4b8dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_86af2511-c933-4222-9d4a-74f77f906e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_04e03ab8-f2ca-4cd7-92d2-55d184a4b8dd" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_86af2511-c933-4222-9d4a-74f77f906e9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_f41d6d7c-6981-4cde-bb64-ca7c1127e4d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_04e03ab8-f2ca-4cd7-92d2-55d184a4b8dd" xlink:to="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLoss_f41d6d7c-6981-4cde-bb64-ca7c1127e4d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_38a981cd-6370-4a33-834f-1990439c3913" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_04e03ab8-f2ca-4cd7-92d2-55d184a4b8dd" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_38a981cd-6370-4a33-834f-1990439c3913" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_cae6302f-7301-40dd-a3e5-f375eceec7a4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_38a981cd-6370-4a33-834f-1990439c3913" xlink:to="loc_srt_ProductOrServiceAxis_cae6302f-7301-40dd-a3e5-f375eceec7a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cae6302f-7301-40dd-a3e5-f375eceec7a4_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_cae6302f-7301-40dd-a3e5-f375eceec7a4" xlink:to="loc_srt_ProductsAndServicesDomain_cae6302f-7301-40dd-a3e5-f375eceec7a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_691f641f-c2d9-47ba-a8ec-a33802a8ae41" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_cae6302f-7301-40dd-a3e5-f375eceec7a4" xlink:to="loc_srt_ProductsAndServicesDomain_691f641f-c2d9-47ba-a8ec-a33802a8ae41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseRevenueTransactionsMember_7fa30e0a-14a0-4c73-b9cb-ecf6231b58d3" xlink:href="din-20211231.xsd#din_FranchiseRevenueTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_691f641f-c2d9-47ba-a8ec-a33802a8ae41" xlink:to="loc_din_FranchiseRevenueTransactionsMember_7fa30e0a-14a0-4c73-b9cb-ecf6231b58d3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails" xlink:type="simple" xlink:href="din-20211231.xsd#RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails" xlink:type="extended" id="ibcc7368918f74b6aa2d2bc8ba16cd9df_RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_1708e7ef-36a8-46f5-a597-b7fa6e9e8622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_1708e7ef-36a8-46f5-a597-b7fa6e9e8622" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_de553840-687c-4a6d-82e9-ab8138f6053f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_de553840-687c-4a6d-82e9-ab8138f6053f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_94dce8dc-abb5-4d61-a7a8-da7dca06350c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_de553840-687c-4a6d-82e9-ab8138f6053f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_94dce8dc-abb5-4d61-a7a8-da7dca06350c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1" xlink:type="simple" xlink:href="din-20211231.xsd#RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1" xlink:type="extended" id="i68f8d523b3d44947a5c6138e223ecf3f_RevenueDisclosuresDeferredrevenueexpectedtoberecognizedDetails_1">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_1708e7ef-36a8-46f5-a597-b7fa6e9e8622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_1708e7ef-36a8-46f5-a597-b7fa6e9e8622" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_de553840-687c-4a6d-82e9-ab8138f6053f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_e079adc6-d961-4ba1-82c1-7e36dc074763" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_de553840-687c-4a6d-82e9-ab8138f6053f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CurrentExpectedCreditLossesCECLNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLNarrativeDetails" xlink:type="extended" id="i6c7e4bc5eff94f4d80a20b405620f489_CurrentExpectedCreditLossesCECLNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableTerm_5af89327-966e-4ef9-8afc-29e88cfe9be3" xlink:href="din-20211231.xsd#din_NotesReceivableTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_din_NotesReceivableTerm_5af89327-966e-4ef9-8afc-29e88cfe9be3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableInterestRate_4e33fdb1-89b8-4244-a867-ecbcfd0d1c3e" xlink:href="din-20211231.xsd#din_NotesReceivableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_din_NotesReceivableInterestRate_4e33fdb1-89b8-4244-a867-ecbcfd0d1c3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_d9acd2b1-a394-4bb4-b6fc-3e05ca1860d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_us-gaap_AccountsAndFinancingReceivableAllowanceForCreditLoss_d9acd2b1-a394-4bb4-b6fc-3e05ca1860d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentLeaseReceivableAverageAnnualInterestRate_d482f166-76ed-4d60-8508-fa2409535c21" xlink:href="din-20211231.xsd#din_EquipmentLeaseReceivableAverageAnnualInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_din_EquipmentLeaseReceivableAverageAnnualInterestRate_d482f166-76ed-4d60-8508-fa2409535c21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_5268a834-d735-43a8-9fcc-48dc00e2668a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_5268a834-d735-43a8-9fcc-48dc00e2668a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfPropertiesSubjectToGroundLeases_269ba491-e19f-4614-9174-52647c4dba17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfPropertiesSubjectToGroundLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_us-gaap_NumberOfPropertiesSubjectToGroundLeases_269ba491-e19f-4614-9174-52647c4dba17" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_806a90df-57e1-44d6-8d35-cc46bae3b03b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_806a90df-57e1-44d6-8d35-cc46bae3b03b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_21446566-37ef-46ea-b79e-3d41010b6512" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_93f9320a-e4d7-43b9-8ba3-2986dfdd90e9" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_21446566-37ef-46ea-b79e-3d41010b6512" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_32a02307-07d0-44a6-b5d9-d74afe5b66fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_21446566-37ef-46ea-b79e-3d41010b6512" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_32a02307-07d0-44a6-b5d9-d74afe5b66fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_32a02307-07d0-44a6-b5d9-d74afe5b66fc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_32a02307-07d0-44a6-b5d9-d74afe5b66fc" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_32a02307-07d0-44a6-b5d9-d74afe5b66fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_1805d4ff-7e5a-4e01-8014-bf84faaa8562" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_32a02307-07d0-44a6-b5d9-d74afe5b66fc" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_1805d4ff-7e5a-4e01-8014-bf84faaa8562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivablePortfolioSegmentMember_8d7082e5-18c6-475c-b5b1-ee37c0268074" xlink:href="din-20211231.xsd#din_NotesReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_1805d4ff-7e5a-4e01-8014-bf84faaa8562" xlink:to="loc_din_NotesReceivablePortfolioSegmentMember_8d7082e5-18c6-475c-b5b1-ee37c0268074" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_2f6274b6-2e42-4191-a726-d2e622bd567e" xlink:href="din-20211231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_1805d4ff-7e5a-4e01-8014-bf84faaa8562" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_2f6274b6-2e42-4191-a726-d2e622bd567e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DirectFinancingLeasesMember_41b5be31-7750-4839-9758-7ef378374a81" xlink:href="din-20211231.xsd#din_DirectFinancingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_1805d4ff-7e5a-4e01-8014-bf84faaa8562" xlink:to="loc_din_DirectFinancingLeasesMember_41b5be31-7750-4839-9758-7ef378374a81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5b7caf9b-521b-4164-9a4e-de4efd58cd63" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_21446566-37ef-46ea-b79e-3d41010b6512" xlink:to="loc_dei_LegalEntityAxis_5b7caf9b-521b-4164-9a4e-de4efd58cd63" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5b7caf9b-521b-4164-9a4e-de4efd58cd63_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5b7caf9b-521b-4164-9a4e-de4efd58cd63" xlink:to="loc_dei_EntityDomain_5b7caf9b-521b-4164-9a4e-de4efd58cd63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_044c3875-5dd7-4cfe-8c6a-75a1e5f91c53" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5b7caf9b-521b-4164-9a4e-de4efd58cd63" xlink:to="loc_dei_EntityDomain_044c3875-5dd7-4cfe-8c6a-75a1e5f91c53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_b1bb3a8c-de88-40a0-b18c-6240660f9bfa" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_044c3875-5dd7-4cfe-8c6a-75a1e5f91c53" xlink:to="loc_din_IhopMember_b1bb3a8c-de88-40a0-b18c-6240660f9bfa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_42c9b43f-cf05-4a69-b909-5157458a275c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_21446566-37ef-46ea-b79e-3d41010b6512" xlink:to="loc_srt_RangeAxis_42c9b43f-cf05-4a69-b909-5157458a275c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_42c9b43f-cf05-4a69-b909-5157458a275c_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_42c9b43f-cf05-4a69-b909-5157458a275c" xlink:to="loc_srt_RangeMember_42c9b43f-cf05-4a69-b909-5157458a275c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_63cfed94-d2c2-4b21-b6df-39743d016ef5" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_42c9b43f-cf05-4a69-b909-5157458a275c" xlink:to="loc_srt_RangeMember_63cfed94-d2c2-4b21-b6df-39743d016ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_537156c8-04ef-4833-872f-5f3b3956e48e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_63cfed94-d2c2-4b21-b6df-39743d016ef5" xlink:to="loc_srt_MinimumMember_537156c8-04ef-4833-872f-5f3b3956e48e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_fbed41e4-207f-4219-986e-390a26fb6da3" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_63cfed94-d2c2-4b21-b6df-39743d016ef5" xlink:to="loc_srt_MaximumMember_fbed41e4-207f-4219-986e-390a26fb6da3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLComponentsofReceivablesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CurrentExpectedCreditLossesCECLComponentsofReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLComponentsofReceivablesDetails" xlink:type="extended" id="i86eb9534af5847e989b20d68ce4623f7_CurrentExpectedCreditLossesCECLComponentsofReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ed125540-262b-4c85-b239-4ecddece4163" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ed125540-262b-4c85-b239-4ecddece4163" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_698db313-39b7-41a9-97da-4d92db6209c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_698db313-39b7-41a9-97da-4d92db6209c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_GiftCardReceivables_3808bd46-9f83-4507-826d-879c8f848006" xlink:href="din-20211231.xsd#din_GiftCardReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_din_GiftCardReceivables_3808bd46-9f83-4507-826d-879c8f848006" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivable_11697a7e-a909-4c5e-8b1d-9b2f292bcdf8" xlink:href="din-20211231.xsd#din_NotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_din_NotesReceivable_11697a7e-a909-4c5e-8b1d-9b2f292bcdf8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_522a7ed7-7d22-4d41-ab0a-a164c6ca87ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_522a7ed7-7d22-4d41-ab0a-a164c6ca87ac" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AccountsAndFinancingReceivableBeforeAllowanceForCreditLoss_18c46016-3284-427c-a212-f8b968bab7a8" xlink:href="din-20211231.xsd#din_AccountsAndFinancingReceivableBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_din_AccountsAndFinancingReceivableBeforeAllowanceForCreditLoss_18c46016-3284-427c-a212-f8b968bab7a8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables_79f19ed4-838c-451b-89a4-3b1b70f53198" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables_79f19ed4-838c-451b-89a4-3b1b70f53198" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_a93d4c1b-4772-48bd-a1f0-d23a220abda1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_a93d4c1b-4772-48bd-a1f0-d23a220abda1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_df796a23-5038-4f21-b431-097a0d84787a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_df796a23-5038-4f21-b431-097a0d84787a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent_494975dc-fa43-4d9b-8360-dd1a09094620" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableClassifiedAbstract_265bd2a3-6400-47db-b9f3-9b6ea832d159" xlink:to="loc_us-gaap_LongTermAccountsNotesAndLoansReceivableNetNoncurrent_494975dc-fa43-4d9b-8360-dd1a09094620" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_42d1040b-d7cf-4800-8d69-7fe3a4a2b7c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_ed125540-262b-4c85-b239-4ecddece4163" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_42d1040b-d7cf-4800-8d69-7fe3a4a2b7c7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_e850564b-121d-45e6-9426-135d558c931a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_42d1040b-d7cf-4800-8d69-7fe3a4a2b7c7" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_e850564b-121d-45e6-9426-135d558c931a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_e850564b-121d-45e6-9426-135d558c931a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_e850564b-121d-45e6-9426-135d558c931a" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_e850564b-121d-45e6-9426-135d558c931a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_10952aed-e5e0-4163-8b10-0a68a733cc4d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_e850564b-121d-45e6-9426-135d558c931a" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_10952aed-e5e0-4163-8b10-0a68a733cc4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentLeasesReceivableMember_f6414420-9e0f-47bf-bb78-c1790df8bb3b" xlink:href="din-20211231.xsd#din_EquipmentLeasesReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_10952aed-e5e0-4163-8b10-0a68a733cc4d" xlink:to="loc_din_EquipmentLeasesReceivableMember_f6414420-9e0f-47bf-bb78-c1790df8bb3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DirectFinancingLeasesMember_6537a3c3-dd0c-49a8-9322-a9185867667a" xlink:href="din-20211231.xsd#din_DirectFinancingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_10952aed-e5e0-4163-8b10-0a68a733cc4d" xlink:to="loc_din_DirectFinancingLeasesMember_6537a3c3-dd0c-49a8-9322-a9185867667a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherReceivablesMember_633b3fda-8df4-4d3a-8db8-97280de96223" xlink:href="din-20211231.xsd#din_OtherReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_10952aed-e5e0-4163-8b10-0a68a733cc4d" xlink:to="loc_din_OtherReceivablesMember_633b3fda-8df4-4d3a-8db8-97280de96223" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLChangesintheAllowanceforCreditLossesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CurrentExpectedCreditLossesCECLChangesintheAllowanceforCreditLossesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLChangesintheAllowanceforCreditLossesDetails" xlink:type="extended" id="ie879cb15e7b74ff198c8c5ee667a32a6_CurrentExpectedCreditLossesCECLChangesintheAllowanceforCreditLossesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_4307b861-6daf-49c1-be31-4e59bbe65b38" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_4307b861-6daf-49c1-be31-4e59bbe65b38" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_4bb7b263-2098-4be3-bbbb-1181c48c650c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_4bb7b263-2098-4be3-bbbb-1181c48c650c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_16de98ee-848e-4e3d-aec6-e1569b2d8713" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_ad91add6-5f66-4092-aa44-d1000e5685d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_ad91add6-5f66-4092-aa44-d1000e5685d1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment_c5ff1b74-bb7f-496a-98c7-ed29cea40856" xlink:href="din-20211231.xsd#din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:to="loc_din_FinancingReceivableAllowanceforCreditLossAdvertisingProvisionAdjustment_c5ff1b74-bb7f-496a-98c7-ed29cea40856" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_404a8042-7d90-4ec9-9725-e886e610b3e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_404a8042-7d90-4ec9-9725-e886e610b3e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_a322d0e8-ac10-4b13-98e6-acf953e6fe8e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_7a3ab8ae-b1a8-4ea5-8487-991c6e2b3703" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_a322d0e8-ac10-4b13-98e6-acf953e6fe8e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_9218a263-24e5-479a-beab-7f88579a8cbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c842ab07-3d43-4cf4-9565-fc3cfc5383c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_4307b861-6daf-49c1-be31-4e59bbe65b38" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c842ab07-3d43-4cf4-9565-fc3cfc5383c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f84deca7-8e1d-46ff-a4fd-6ead7d87da18" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c842ab07-3d43-4cf4-9565-fc3cfc5383c9" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f84deca7-8e1d-46ff-a4fd-6ead7d87da18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f84deca7-8e1d-46ff-a4fd-6ead7d87da18_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f84deca7-8e1d-46ff-a4fd-6ead7d87da18" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f84deca7-8e1d-46ff-a4fd-6ead7d87da18_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f84deca7-8e1d-46ff-a4fd-6ead7d87da18" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_AccountsReceivablePortfolioSegmentMember_d00921a8-17e6-4f20-86be-2517d58c45f1" xlink:href="din-20211231.xsd#din_AccountsReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_AccountsReceivablePortfolioSegmentMember_d00921a8-17e6-4f20-86be-2517d58c45f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentPortfolioSegmentMember_a99c989a-8793-48da-b40b-9c70c70dc560" xlink:href="din-20211231.xsd#din_NotesReceivableCurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_NotesReceivableCurrentPortfolioSegmentMember_a99c989a-8793-48da-b40b-9c70c70dc560" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_ee496c99-baa6-432e-b84b-120698efe7ab" xlink:href="din-20211231.xsd#din_NotesReceivableNoncurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_ee496c99-baa6-432e-b84b-120698efe7ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_0ce5e546-d7e3-4e1f-b89a-7a0d1bf050b1" xlink:href="din-20211231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_0ce5e546-d7e3-4e1f-b89a-7a0d1bf050b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_3174c723-ef26-4168-beb8-f7f818c3c08d" xlink:href="din-20211231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_3174c723-ef26-4168-beb8-f7f818c3c08d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherPortfolioSegmentMember_0321b580-3156-42fc-8c50-c91140ee2bf1" xlink:href="din-20211231.xsd#din_OtherPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_d5c6cad0-b51f-4dae-8e92-d135c5e096b7" xlink:to="loc_din_OtherPortfolioSegmentMember_0321b580-3156-42fc-8c50-c91140ee2bf1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_10c859ac-18bc-4994-a26b-e9dcc4fcb394" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c842ab07-3d43-4cf4-9565-fc3cfc5383c9" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_10c859ac-18bc-4994-a26b-e9dcc4fcb394" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10c859ac-18bc-4994-a26b-e9dcc4fcb394_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_10c859ac-18bc-4994-a26b-e9dcc4fcb394" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10c859ac-18bc-4994-a26b-e9dcc4fcb394_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_5e7a9372-a7a8-4951-b84f-5c388bbc734e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_10c859ac-18bc-4994-a26b-e9dcc4fcb394" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_5e7a9372-a7a8-4951-b84f-5c388bbc734e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_9d316011-607a-4156-8931-32dc88bf38e8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_5e7a9372-a7a8-4951-b84f-5c388bbc734e" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_9d316011-607a-4156-8931-32dc88bf38e8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLDelinquencyStatusofReceivablesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CurrentExpectedCreditLossesCECLDelinquencyStatusofReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLDelinquencyStatusofReceivablesDetails" xlink:type="extended" id="ibc97baf82fec43288ba2da74c7ae8426_CurrentExpectedCreditLossesCECLDelinquencyStatusofReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_b6a89cf0-6736-486c-ab84-2334971e1fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_285b75c5-c8fa-41df-b1fa-abb016d54a2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_b6a89cf0-6736-486c-ab84-2334971e1fc5" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_285b75c5-c8fa-41df-b1fa-abb016d54a2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_4b13f4da-dbcd-44ba-be66-5efce672ada8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_b6a89cf0-6736-486c-ab84-2334971e1fc5" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_4b13f4da-dbcd-44ba-be66-5efce672ada8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f1ce5089-3cbb-4892-8fe2-736e6b7e906d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_4b13f4da-dbcd-44ba-be66-5efce672ada8" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f1ce5089-3cbb-4892-8fe2-736e6b7e906d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f1ce5089-3cbb-4892-8fe2-736e6b7e906d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f1ce5089-3cbb-4892-8fe2-736e6b7e906d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_f1ce5089-3cbb-4892-8fe2-736e6b7e906d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_f1ce5089-3cbb-4892-8fe2-736e6b7e906d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentPortfolioSegmentMember_3d8e05b5-72be-46a7-9d8d-c2c986f4fc9a" xlink:href="din-20211231.xsd#din_NotesReceivableCurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:to="loc_din_NotesReceivableCurrentPortfolioSegmentMember_3d8e05b5-72be-46a7-9d8d-c2c986f4fc9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_52fb66a6-a05d-4e58-a429-21c0a719f3c3" xlink:href="din-20211231.xsd#din_NotesReceivableNoncurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:to="loc_din_NotesReceivableNoncurrentPortfolioSegmentMember_52fb66a6-a05d-4e58-a429-21c0a719f3c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_77f50b30-9ffc-4f48-9ab0-5e164238db86" xlink:href="din-20211231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_77f50b30-9ffc-4f48-9ab0-5e164238db86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_1fb370ea-da77-43cc-a9e8-abc56a3a900d" xlink:href="din-20211231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_1fb370ea-da77-43cc-a9e8-abc56a3a900d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OtherPortfolioSegmentMember_ad804b75-7d9f-4c98-8437-e94936a919bc" xlink:href="din-20211231.xsd#din_OtherPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_930ec084-ebe6-4d39-9e60-543d830f018c" xlink:to="loc_din_OtherPortfolioSegmentMember_ad804b75-7d9f-4c98-8437-e94936a919bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_60837e5e-23f8-4190-b343-cbdc5be79057" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_4b13f4da-dbcd-44ba-be66-5efce672ada8" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_60837e5e-23f8-4190-b343-cbdc5be79057" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_60837e5e-23f8-4190-b343-cbdc5be79057_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_60837e5e-23f8-4190-b343-cbdc5be79057" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_60837e5e-23f8-4190-b343-cbdc5be79057_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_60837e5e-23f8-4190-b343-cbdc5be79057" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_faf351c3-2701-41e5-8e40-8fb79f0e16fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_faf351c3-2701-41e5-8e40-8fb79f0e16fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_9a24f7e8-2a63-40ec-a0ef-3435325d7892" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:to="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_9a24f7e8-2a63-40ec-a0ef-3435325d7892" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_058f8699-c97d-4599-ad92-fb83d9ff789a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_058f8699-c97d-4599-ad92-fb83d9ff789a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancialAsset90to119DaysPastDueMember_a21bea18-b615-4e72-824a-09bb352425ac" xlink:href="din-20211231.xsd#din_FinancialAsset90to119DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:to="loc_din_FinancialAsset90to119DaysPastDueMember_a21bea18-b615-4e72-824a-09bb352425ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancialAsset120OrMoreDaysPastDueMember_42e9851f-0896-46ef-a153-79fc8e5a8feb" xlink:href="din-20211231.xsd#din_FinancialAsset120OrMoreDaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_3a7001e4-97f2-4b45-872e-6d7b24a181de" xlink:to="loc_din_FinancialAsset120OrMoreDaysPastDueMember_42e9851f-0896-46ef-a153-79fc8e5a8feb" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLYearofOriginationofFinancingReceivablesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CurrentExpectedCreditLossesCECLYearofOriginationofFinancingReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CurrentExpectedCreditLossesCECLYearofOriginationofFinancingReceivablesDetails" xlink:type="extended" id="if6cf68675ef244e888c746e23833cc16_CurrentExpectedCreditLossesCECLYearofOriginationofFinancingReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_500cd558-9a79-4687-ae33-26faf8a9b779" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_500cd558-9a79-4687-ae33-26faf8a9b779" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_ad3d502c-4136-40a5-aec5-39443680e9ce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_ad3d502c-4136-40a5-aec5-39443680e9ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_358f26fa-0956-4de8-ae72-a1d042fcd9d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_358f26fa-0956-4de8-ae72-a1d042fcd9d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_16bb817d-e41d-4d81-bd27-1dba0fde66af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_16bb817d-e41d-4d81-bd27-1dba0fde66af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_df710d1d-ca9f-4aef-bd5a-7d02cbe76c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_df710d1d-ca9f-4aef-bd5a-7d02cbe76c9f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_512e63b3-6a43-4669-819b-718c32666a67" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_512e63b3-6a43-4669-819b-718c32666a67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8207651c-448a-4eba-b318-229adb3a69d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8207651c-448a-4eba-b318-229adb3a69d1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_fc977ac4-be4c-4c4e-865f-bf3cef36cd37" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a84fb7e2-a28a-4906-8088-73e29b33481c" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_fc977ac4-be4c-4c4e-865f-bf3cef36cd37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_fc977ac4-be4c-4c4e-865f-bf3cef36cd37" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_3cb62655-ef7b-4d06-b6df-a6f721d3fbee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e6bb4b34-46dc-4e3d-83a6-2c0787f5dc7a" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_3cb62655-ef7b-4d06-b6df-a6f721d3fbee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember_7c8c2493-9b00-4c1a-94b5-1adc0b419bd7" xlink:href="din-20211231.xsd#din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_3cb62655-ef7b-4d06-b6df-a6f721d3fbee" xlink:to="loc_din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember_7c8c2493-9b00-4c1a-94b5-1adc0b419bd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NotesReceivableCurrentAndNoncurrentPortfolioSegmentMember_9292df58-c4fa-45cc-b611-2c6ff1816b40" xlink:href="din-20211231.xsd#din_NotesReceivableCurrentAndNoncurrentPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember_7c8c2493-9b00-4c1a-94b5-1adc0b419bd7" xlink:to="loc_din_NotesReceivableCurrentAndNoncurrentPortfolioSegmentMember_9292df58-c4fa-45cc-b611-2c6ff1816b40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseReceivablePortfolioSegmentMember_d441cab2-1c65-4ff2-86ff-2731b98c800a" xlink:href="din-20211231.xsd#din_LeaseReceivablePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember_7c8c2493-9b00-4c1a-94b5-1adc0b419bd7" xlink:to="loc_din_LeaseReceivablePortfolioSegmentMember_d441cab2-1c65-4ff2-86ff-2731b98c800a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentNotesPortfolioSegmentMember_e6fabee3-7fd3-4f48-9a20-f0ffdc24cbfa" xlink:href="din-20211231.xsd#din_EquipmentNotesPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_NotesReceivablePortfolioSegmentsLeaseReceivablePortfolioSegmentAndEquipmentNotesPortfolioSegmentMember_7c8c2493-9b00-4c1a-94b5-1adc0b419bd7" xlink:to="loc_din_EquipmentNotesPortfolioSegmentMember_e6fabee3-7fd3-4f48-9a20-f0ffdc24cbfa" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="din-20211231.xsd#PropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/PropertyandEquipmentDetails" xlink:type="extended" id="i305f824407d143caae6cb09e2dd469c9_PropertyandEquipmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_8c2920d2-7f34-4558-a0c1-d627fc10e6d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_8c2920d2-7f34-4558-a0c1-d627fc10e6d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_b21ad8ac-77ee-414c-a07d-f0b0c1b7cd86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_b21ad8ac-77ee-414c-a07d-f0b0c1b7cd86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_ef1de2b6-e329-4fa2-864a-89f0a3922da6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_ef1de2b6-e329-4fa2-864a-89f0a3922da6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_547042b6-6b74-4c4a-94c3-d55f22f9576b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_547042b6-6b74-4c4a-94c3-d55f22f9576b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_124b0b1a-937f-401e-8859-ec70dea4205b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_124b0b1a-937f-401e-8859-ec70dea4205b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e49560f3-7275-4b56-abd7-7b46db3f1162" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_6c5c80c0-8299-4eaa-8988-c115c7375213" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e49560f3-7275-4b56-abd7-7b46db3f1162" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_420347d1-58c1-4ddd-b89d-0436ba052241" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e49560f3-7275-4b56-abd7-7b46db3f1162" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_420347d1-58c1-4ddd-b89d-0436ba052241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_420347d1-58c1-4ddd-b89d-0436ba052241_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_420347d1-58c1-4ddd-b89d-0436ba052241" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_420347d1-58c1-4ddd-b89d-0436ba052241_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_420347d1-58c1-4ddd-b89d-0436ba052241" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_d1f2abe9-40b0-4542-ad53-c4c90590f3bf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_us-gaap_LeaseholdsAndLeaseholdImprovementsMember_d1f2abe9-40b0-4542-ad53-c4c90590f3bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PropertiesUnderFinanceLeaseMember_7dd8c883-144b-4a32-bb3e-60b0eeab9c49" xlink:href="din-20211231.xsd#din_PropertiesUnderFinanceLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_din_PropertiesUnderFinanceLeaseMember_7dd8c883-144b-4a32-bb3e-60b0eeab9c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EquipmentAndFixturesMember_0ed8c589-485d-44c0-afd3-e4451bb753af" xlink:href="din-20211231.xsd#din_EquipmentAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_din_EquipmentAndFixturesMember_0ed8c589-485d-44c0-afd3-e4451bb753af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_41c5cca1-4041-4792-aa77-80314b3190fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_41c5cca1-4041-4792-aa77-80314b3190fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_45089b4b-e0e4-4a03-af88-be194252b993" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_us-gaap_LandMember_45089b4b-e0e4-4a03-af88-be194252b993" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_73f20fa2-edc5-43ce-ab8b-d61f334ac1ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_73f20fa2-edc5-43ce-ab8b-d61f334ac1ea" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_9b63ab5c-6ddd-4c34-8ebb-35cee1859c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_45033969-fb75-4f03-82ea-b64282d441d7" xlink:to="loc_us-gaap_ConstructionInProgressMember_9b63ab5c-6ddd-4c34-8ebb-35cee1859c4e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillChangesInCarryingAmountofGoodwillDetails" xlink:type="simple" xlink:href="din-20211231.xsd#GoodwillChangesInCarryingAmountofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillChangesInCarryingAmountofGoodwillDetails" xlink:type="extended" id="i603f985d474b4b0da3583c949edb5221_GoodwillChangesInCarryingAmountofGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_2a9fc88e-6dca-46ac-994e-76cdc34070b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_225e208e-38fc-43e3-9efb-1a2ad66b29f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_2a9fc88e-6dca-46ac-994e-76cdc34070b3" xlink:to="loc_us-gaap_GoodwillRollForward_225e208e-38fc-43e3-9efb-1a2ad66b29f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_e931b61c-0a59-4528-b0fd-808cc4e539d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_225e208e-38fc-43e3-9efb-1a2ad66b29f3" xlink:to="loc_us-gaap_Goodwill_e931b61c-0a59-4528-b0fd-808cc4e539d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_9033aba0-7995-4c84-a68a-37f4a2b8e802" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_225e208e-38fc-43e3-9efb-1a2ad66b29f3" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_9033aba0-7995-4c84-a68a-37f4a2b8e802" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_71bc7347-4b1c-4982-9308-10c7bf68ee5b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_225e208e-38fc-43e3-9efb-1a2ad66b29f3" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_71bc7347-4b1c-4982-9308-10c7bf68ee5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_aeedbb1a-301e-4769-90fe-e1de0db64919" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_ee044701-6b29-415a-ab50-812dc82819ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_2a9fc88e-6dca-46ac-994e-76cdc34070b3" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_ee044701-6b29-415a-ab50-812dc82819ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_9cb87de8-4405-4a00-914a-4c51826c4bc8" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ee044701-6b29-415a-ab50-812dc82819ac" xlink:to="loc_dei_LegalEntityAxis_9cb87de8-4405-4a00-914a-4c51826c4bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9cb87de8-4405-4a00-914a-4c51826c4bc8_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_9cb87de8-4405-4a00-914a-4c51826c4bc8" xlink:to="loc_dei_EntityDomain_9cb87de8-4405-4a00-914a-4c51826c4bc8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_21bc5e0c-4ffc-4dbe-b05c-75520a70cd12" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_9cb87de8-4405-4a00-914a-4c51826c4bc8" xlink:to="loc_dei_EntityDomain_21bc5e0c-4ffc-4dbe-b05c-75520a70cd12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_4e0d231d-3d6c-4c27-adb6-00e813c17fa0" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_21bc5e0c-4ffc-4dbe-b05c-75520a70cd12" xlink:to="loc_din_ApplebeesMember_4e0d231d-3d6c-4c27-adb6-00e813c17fa0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_afd18cdf-771d-4d75-ad9d-e628a2e357b4" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_21bc5e0c-4ffc-4dbe-b05c-75520a70cd12" xlink:to="loc_din_IhopMember_afd18cdf-771d-4d75-ad9d-e628a2e357b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ee044701-6b29-415a-ab50-812dc82819ac" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_7b3ae743-3fbb-4a2f-8a37-67fd8cadad1a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_f3ed67f2-b758-42ee-8b83-b3a376cf2ff5" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_7b3ae743-3fbb-4a2f-8a37-67fd8cadad1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_b866a992-b2c1-4432-9bed-5c5c513a3489" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_7b3ae743-3fbb-4a2f-8a37-67fd8cadad1a" xlink:to="loc_us-gaap_FranchisedUnitsMember_b866a992-b2c1-4432-9bed-5c5c513a3489" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_14a1adea-77c1-41d7-8ebe-d943746e14eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_7b3ae743-3fbb-4a2f-8a37-67fd8cadad1a" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_14a1adea-77c1-41d7-8ebe-d943746e14eb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillGrossandnetcarryingamountsofgoodwillDetails" xlink:type="simple" xlink:href="din-20211231.xsd#GoodwillGrossandnetcarryingamountsofgoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillGrossandnetcarryingamountsofgoodwillDetails" xlink:type="extended" id="ib13697b0f8ae4483a48fe09d64e5e3c2_GoodwillGrossandnetcarryingamountsofgoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_0318c3da-748e-49aa-b5ea-e2000b3615c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_5febdfba-55a3-4239-a00e-62e0960ef5f2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_0318c3da-748e-49aa-b5ea-e2000b3615c3" xlink:to="loc_us-gaap_GoodwillGross_5febdfba-55a3-4239-a00e-62e0960ef5f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e1d6df7f-5e52-40b9-b360-46a49c2b1dc1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_0318c3da-748e-49aa-b5ea-e2000b3615c3" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e1d6df7f-5e52-40b9-b360-46a49c2b1dc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_36b1c571-746e-406d-aa63-f9bfb1bd22d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_0318c3da-748e-49aa-b5ea-e2000b3615c3" xlink:to="loc_us-gaap_Goodwill_36b1c571-746e-406d-aa63-f9bfb1bd22d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_d38ad88a-fa38-4f96-89dc-60a685323375" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_0318c3da-748e-49aa-b5ea-e2000b3615c3" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_d38ad88a-fa38-4f96-89dc-60a685323375" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_57cab946-b49d-4ed7-9b8d-a95df345595c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_d38ad88a-fa38-4f96-89dc-60a685323375" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_57cab946-b49d-4ed7-9b8d-a95df345595c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_57cab946-b49d-4ed7-9b8d-a95df345595c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_57cab946-b49d-4ed7-9b8d-a95df345595c" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_57cab946-b49d-4ed7-9b8d-a95df345595c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_9c6454c7-54b7-49e9-92a6-c50a2cefb2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_57cab946-b49d-4ed7-9b8d-a95df345595c" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_9c6454c7-54b7-49e9-92a6-c50a2cefb2e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_d5849b18-5edd-4c4d-a81f-6aa94363526c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_9c6454c7-54b7-49e9-92a6-c50a2cefb2e8" xlink:to="loc_us-gaap_FranchisedUnitsMember_d5849b18-5edd-4c4d-a81f-6aa94363526c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_6a70ca8a-89df-4dbf-9faa-2378c51ce854" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_9c6454c7-54b7-49e9-92a6-c50a2cefb2e8" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_6a70ca8a-89df-4dbf-9faa-2378c51ce854" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_d38ad88a-fa38-4f96-89dc-60a685323375" xlink:to="loc_dei_LegalEntityAxis_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb" xlink:to="loc_dei_EntityDomain_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_44246920-07f5-44e4-a452-3328ad2b9401" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ce7ad5f0-c3b4-4bcd-82eb-cf31fb258dfb" xlink:to="loc_dei_EntityDomain_44246920-07f5-44e4-a452-3328ad2b9401" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_5e809602-322f-4254-a0f2-dddac75983d9" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_44246920-07f5-44e4-a452-3328ad2b9401" xlink:to="loc_din_ApplebeesMember_5e809602-322f-4254-a0f2-dddac75983d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_b0528d0f-2e43-4068-8a8b-c50e7de9f262" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_44246920-07f5-44e4-a452-3328ad2b9401" xlink:to="loc_din_IhopMember_b0528d0f-2e43-4068-8a8b-c50e7de9f262" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/GoodwillNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#GoodwillNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/GoodwillNarrativeDetails" xlink:type="extended" id="i17fc1ee5c60a4cd8a599a43ee5d7ae94_GoodwillNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_7de82ee7-4293-490e-87d6-0ec34a97ce43" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_a7f85de0-a9c4-4e3e-82e1-69f17f95d8ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_7de82ee7-4293-490e-87d6-0ec34a97ce43" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_a7f85de0-a9c4-4e3e-82e1-69f17f95d8ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_e92349cd-ea41-4df4-9da5-f377c0cf690b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_7de82ee7-4293-490e-87d6-0ec34a97ce43" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_e92349cd-ea41-4df4-9da5-f377c0cf690b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_e92349cd-ea41-4df4-9da5-f377c0cf690b" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_ede0f19a-d61c-4c03-ade6-bfd8e56dbea9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_a25c2553-e8d5-4b1b-a7f6-9afe37ef1b1d" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_ede0f19a-d61c-4c03-ade6-bfd8e56dbea9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_b728a076-cb08-40a8-b7d4-8b71b6e74057" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_ede0f19a-d61c-4c03-ade6-bfd8e56dbea9" xlink:to="loc_us-gaap_FranchisedUnitsMember_b728a076-cb08-40a8-b7d4-8b71b6e74057" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_f86d2d18-91e0-4617-8aa3-0d4b03499174" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_ede0f19a-d61c-4c03-ade6-bfd8e56dbea9" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_f86d2d18-91e0-4617-8aa3-0d4b03499174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_fba41b78-affa-44ea-84a7-927956a06192" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_e92349cd-ea41-4df4-9da5-f377c0cf690b" xlink:to="loc_dei_LegalEntityAxis_fba41b78-affa-44ea-84a7-927956a06192" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_fba41b78-affa-44ea-84a7-927956a06192_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_fba41b78-affa-44ea-84a7-927956a06192" xlink:to="loc_dei_EntityDomain_fba41b78-affa-44ea-84a7-927956a06192_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_47ab3f02-d938-4450-b890-aa3f0ac380a4" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_fba41b78-affa-44ea-84a7-927956a06192" xlink:to="loc_dei_EntityDomain_47ab3f02-d938-4450-b890-aa3f0ac380a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_7ccd0c96-86bc-4fbd-a002-2c9447974da8" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_47ab3f02-d938-4450-b890-aa3f0ac380a4" xlink:to="loc_din_ApplebeesMember_7ccd0c96-86bc-4fbd-a002-2c9447974da8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails" xlink:type="simple" xlink:href="din-20211231.xsd#OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails" xlink:type="extended" id="i6c9bb21dad3d4628832fff1adce01a9f_OtherIntangibleAssetsOtherIntangibleAssetsRollForwardDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_9346a9c2-6b3d-4082-b7a9-61dba4c036de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_b2e3e7e0-b6a1-43b6-ae89-e9a51e76a15e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_9346a9c2-6b3d-4082-b7a9-61dba4c036de" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_b2e3e7e0-b6a1-43b6-ae89-e9a51e76a15e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_c700dfa0-4723-426a-8f05-fbc50f09f8bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_9346a9c2-6b3d-4082-b7a9-61dba4c036de" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_c700dfa0-4723-426a-8f05-fbc50f09f8bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease_56008ae3-afc2-41f3-97be-5571469e3934" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_9346a9c2-6b3d-4082-b7a9-61dba4c036de" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease_56008ae3-afc2-41f3-97be-5571469e3934" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_18d1e367-9bc4-4179-9ab8-f7fceebb2826" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_679ee9e5-ac4f-4f5c-ac46-3dd53cbbddf7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_9346a9c2-6b3d-4082-b7a9-61dba4c036de" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_679ee9e5-ac4f-4f5c-ac46-3dd53cbbddf7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_a5c44d5d-ff30-4784-9900-5159ba0317ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_679ee9e5-ac4f-4f5c-ac46-3dd53cbbddf7" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_a5c44d5d-ff30-4784-9900-5159ba0317ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_a5c44d5d-ff30-4784-9900-5159ba0317ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_a5c44d5d-ff30-4784-9900-5159ba0317ab" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_a5c44d5d-ff30-4784-9900-5159ba0317ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_c9c6cf08-819f-46a9-800f-947fb0150e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_a5c44d5d-ff30-4784-9900-5159ba0317ab" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_c9c6cf08-819f-46a9-800f-947fb0150e0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_d41a36f1-e856-4a10-a570-c58b9fcd16ce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_c9c6cf08-819f-46a9-800f-947fb0150e0f" xlink:to="loc_us-gaap_TradeNamesMember_d41a36f1-e856-4a10-a570-c58b9fcd16ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_fb3ad435-ac99-40ef-854b-9143988008ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_c9c6cf08-819f-46a9-800f-947fb0150e0f" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_fb3ad435-ac99-40ef-854b-9143988008ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_13858fc1-f164-4e77-b059-19a5cf5f798f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_13858fc1-f164-4e77-b059-19a5cf5f798f" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9fcda2e2-ae6b-47b3-9edc-f94248d16039" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9fcda2e2-ae6b-47b3-9edc-f94248d16039" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_abece1c7-7f09-4338-a0b3-52d420bd68c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_abece1c7-7f09-4338-a0b3-52d420bd68c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_13e35562-e9e1-4a6e-9f78-2a1cd2c9fb9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_13e35562-e9e1-4a6e-9f78-2a1cd2c9fb9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_cde31eda-58a8-429b-bf6f-6c7fa16fe868" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_f3d43710-5f24-4dd4-ae35-5557d9cacc32" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_cde31eda-58a8-429b-bf6f-6c7fa16fe868" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ba1097a4-aff7-471c-aea1-88ee69de42ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_71d4eb2f-9938-472b-bf9d-cc593f239eaf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_13858fc1-f164-4e77-b059-19a5cf5f798f" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_71d4eb2f-9938-472b-bf9d-cc593f239eaf" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_fc714b26-95d1-4001-8c6d-be185a9a80e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_71d4eb2f-9938-472b-bf9d-cc593f239eaf" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_fc714b26-95d1-4001-8c6d-be185a9a80e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fc714b26-95d1-4001-8c6d-be185a9a80e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_fc714b26-95d1-4001-8c6d-be185a9a80e2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_fc714b26-95d1-4001-8c6d-be185a9a80e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cff2bc9a-142b-48bf-a576-4da613c5279a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_fc714b26-95d1-4001-8c6d-be185a9a80e2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cff2bc9a-142b-48bf-a576-4da613c5279a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_c463b150-2797-4b0b-a20f-487e3ee2ee34" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cff2bc9a-142b-48bf-a576-4da613c5279a" xlink:to="loc_us-gaap_FranchiseRightsMember_c463b150-2797-4b0b-a20f-487e3ee2ee34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_3e0d3207-b9ef-412d-a9db-39b26d2dbf3b" xlink:href="din-20211231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cff2bc9a-142b-48bf-a576-4da613c5279a" xlink:to="loc_din_ReacquiredFranchiseRightsMember_3e0d3207-b9ef-412d-a9db-39b26d2dbf3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_0b26ea58-e3e7-4cbc-bdc3-50e58b2ccf6c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_cff2bc9a-142b-48bf-a576-4da613c5279a" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_0b26ea58-e3e7-4cbc-bdc3-50e58b2ccf6c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#OtherIntangibleAssetsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsNarrativeDetails" xlink:type="extended" id="i3837d8b64c9d43c3805425cb376f870e_OtherIntangibleAssetsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfRestaurants_7348badb-3887-44bb-a54c-07d54a8a2711" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_NumberOfRestaurants_7348badb-3887-44bb-a54c-07d54a8a2711" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_5fcdb621-686e-4d33-9db6-7ee2ed873df9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_5fcdb621-686e-4d33-9db6-7ee2ed873df9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_c7e0eae9-c526-48ee-b97c-7d71daf98b9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_c7e0eae9-c526-48ee-b97c-7d71daf98b9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_1bafeca8-55b7-4107-99cd-79ac53ab2ec6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_1bafeca8-55b7-4107-99cd-79ac53ab2ec6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_a1334351-99a5-4439-a7e7-d6ea67dc2732" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_a1334351-99a5-4439-a7e7-d6ea67dc2732" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_9b05315f-ca5e-4d87-b3da-3ec8d0338fca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_9b05315f-ca5e-4d87-b3da-3ec8d0338fca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_ad5decf8-ccaf-4f03-8619-37d3c7f7cec9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_ad5decf8-ccaf-4f03-8619-37d3c7f7cec9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_d84c44db-fff9-4882-b463-3f4e8f9c0b1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_d84c44db-fff9-4882-b463-3f4e8f9c0b1e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_d6d520aa-ea30-43f0-b963-1abb77296ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_d6d520aa-ea30-43f0-b963-1abb77296ff8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_c69f9618-6859-43b8-8c1c-e7facc5e07f6" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_1a2c4f4e-8820-4b88-bdcb-c736b4c8df42" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_2b9f9cc6-b81e-4500-b3a1-c61e53bd2e9e" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_1a2c4f4e-8820-4b88-bdcb-c736b4c8df42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_80fac631-f362-442d-9205-ada6281d3399" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_1a2c4f4e-8820-4b88-bdcb-c736b4c8df42" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_80fac631-f362-442d-9205-ada6281d3399" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_07447518-c275-437c-bd67-3297c6cf0e1e" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:to="loc_dei_LegalEntityAxis_07447518-c275-437c-bd67-3297c6cf0e1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_07447518-c275-437c-bd67-3297c6cf0e1e_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_07447518-c275-437c-bd67-3297c6cf0e1e" xlink:to="loc_dei_EntityDomain_07447518-c275-437c-bd67-3297c6cf0e1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_acbcb94e-da42-4311-bb0e-e2524378bf1b" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_07447518-c275-437c-bd67-3297c6cf0e1e" xlink:to="loc_dei_EntityDomain_acbcb94e-da42-4311-bb0e-e2524378bf1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_504b956f-ab69-41ab-8767-f98e62c0e6c2" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_acbcb94e-da42-4311-bb0e-e2524378bf1b" xlink:to="loc_din_ApplebeesMember_504b956f-ab69-41ab-8767-f98e62c0e6c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_44e36110-12d8-4b2a-9678-d0c3bba23003" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_44e36110-12d8-4b2a-9678-d0c3bba23003" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_44e36110-12d8-4b2a-9678-d0c3bba23003_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_44e36110-12d8-4b2a-9678-d0c3bba23003" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_44e36110-12d8-4b2a-9678-d0c3bba23003_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a0f5e896-5de8-44c0-84f7-b8ed43afd992" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_44e36110-12d8-4b2a-9678-d0c3bba23003" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a0f5e896-5de8-44c0-84f7-b8ed43afd992" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_0f0f46b8-1608-4651-8629-15759024ec39" xlink:href="din-20211231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a0f5e896-5de8-44c0-84f7-b8ed43afd992" xlink:to="loc_din_ReacquiredFranchiseRightsMember_0f0f46b8-1608-4651-8629-15759024ec39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_690a73ef-2e12-4171-b9ee-d7e2f0399e17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_a0f5e896-5de8-44c0-84f7-b8ed43afd992" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_690a73ef-2e12-4171-b9ee-d7e2f0399e17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_24c348c6-dc71-412b-ab62-ffd0f1082fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_a6832cef-e45f-4025-a57a-edaaf5eec850" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_24c348c6-dc71-412b-ab62-ffd0f1082fd5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_24c348c6-dc71-412b-ab62-ffd0f1082fd5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_24c348c6-dc71-412b-ab62-ffd0f1082fd5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_24c348c6-dc71-412b-ab62-ffd0f1082fd5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_55296ac8-6f32-4e65-90c8-094d129d61aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_24c348c6-dc71-412b-ab62-ffd0f1082fd5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_55296ac8-6f32-4e65-90c8-094d129d61aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_3a46f4ea-41ac-4729-aea2-8a0d6857b671" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_55296ac8-6f32-4e65-90c8-094d129d61aa" xlink:to="loc_us-gaap_TradeNamesMember_3a46f4ea-41ac-4729-aea2-8a0d6857b671" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails" xlink:type="extended" id="i74000685ad8042c1a68d86446e5d1be0_OtherIntangibleAssetsScheduleofFinitelivedIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8bfce3e4-3155-4cc4-b32a-be6adeb215ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9d4ddb00-11b4-43ab-bd24-dbed007ae5ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8bfce3e4-3155-4cc4-b32a-be6adeb215ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9d4ddb00-11b4-43ab-bd24-dbed007ae5ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_9734233f-a059-4b0d-9d03-2f6b5e6dce9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8bfce3e4-3155-4cc4-b32a-be6adeb215ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_9734233f-a059-4b0d-9d03-2f6b5e6dce9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f7b9386f-2f56-46ed-a0a6-d1a2abcc59e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8bfce3e4-3155-4cc4-b32a-be6adeb215ad" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f7b9386f-2f56-46ed-a0a6-d1a2abcc59e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_91c8a34a-2d2a-4b9b-9622-20cda4f377fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8bfce3e4-3155-4cc4-b32a-be6adeb215ad" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_91c8a34a-2d2a-4b9b-9622-20cda4f377fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_66d894da-af44-4013-8fd6-e3551f46902a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_91c8a34a-2d2a-4b9b-9622-20cda4f377fc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_66d894da-af44-4013-8fd6-e3551f46902a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66d894da-af44-4013-8fd6-e3551f46902a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_66d894da-af44-4013-8fd6-e3551f46902a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_66d894da-af44-4013-8fd6-e3551f46902a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_124c7cc5-b0f0-4eb5-85f8-faaa0af62836" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_66d894da-af44-4013-8fd6-e3551f46902a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_124c7cc5-b0f0-4eb5-85f8-faaa0af62836" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_a8f543f1-ac89-4172-ae9d-d52a3a154a47" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_124c7cc5-b0f0-4eb5-85f8-faaa0af62836" xlink:to="loc_us-gaap_FranchiseRightsMember_a8f543f1-ac89-4172-ae9d-d52a3a154a47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReacquiredFranchiseRightsMember_feedf228-48e9-4429-b61e-f06fb68a3389" xlink:href="din-20211231.xsd#din_ReacquiredFranchiseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_124c7cc5-b0f0-4eb5-85f8-faaa0af62836" xlink:to="loc_din_ReacquiredFranchiseRightsMember_feedf228-48e9-4429-b61e-f06fb68a3389" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_c2d8c5d3-0991-4900-9a72-4e27a306b3f1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_124c7cc5-b0f0-4eb5-85f8-faaa0af62836" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_c2d8c5d3-0991-4900-9a72-4e27a306b3f1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtScheduleofDebtComponentsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#LongTermDebtScheduleofDebtComponentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtScheduleofDebtComponentsDetails" xlink:type="extended" id="i083b1eef8b034f89842c2697928888ec_LongTermDebtScheduleofDebtComponentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes_c69a824c-1ea0-4fb7-9e4d-f8108d3d1c45" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_SeniorNotes_c69a824c-1ea0-4fb7-9e4d-f8108d3d1c45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_45d7e2c5-984c-4499-b71a-3990f0bb83cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_45d7e2c5-984c-4499-b71a-3990f0bb83cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_de1e80cb-29dd-46da-a358-1191cbec53b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_LongTermDebt_de1e80cb-29dd-46da-a358-1191cbec53b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_94a21bc5-bbc1-4667-9bef-e149ee166eca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_LongTermDebtCurrent_94a21bc5-bbc1-4667-9bef-e149ee166eca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_5d3584fa-a93d-4042-a065-d2e55198aa9a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_5d3584fa-a93d-4042-a065-d2e55198aa9a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1f08337d-9783-4151-bc70-b61a9d362cef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1f08337d-9783-4151-bc70-b61a9d362cef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_3935b5da-929a-4bf1-9bcb-f29244b93b7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0f80620d-08f3-47b1-93ca-d329913b684d" xlink:to="loc_us-gaap_DebtInstrumentTable_3935b5da-929a-4bf1-9bcb-f29244b93b7b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7695d6e9-afc5-4703-9a7d-4b74cad4ed38" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_3935b5da-929a-4bf1-9bcb-f29244b93b7b" xlink:to="loc_us-gaap_DebtInstrumentAxis_7695d6e9-afc5-4703-9a7d-4b74cad4ed38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7695d6e9-afc5-4703-9a7d-4b74cad4ed38_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7695d6e9-afc5-4703-9a7d-4b74cad4ed38" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7695d6e9-afc5-4703-9a7d-4b74cad4ed38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_759310c6-3b0a-489e-8f96-768f5842c8b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7695d6e9-afc5-4703-9a7d-4b74cad4ed38" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_759310c6-3b0a-489e-8f96-768f5842c8b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_b2aa54f4-0c46-45c2-ab12-2cbe7f07ff20" xlink:href="din-20211231.xsd#din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_759310c6-3b0a-489e-8f96-768f5842c8b6" xlink:to="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_b2aa54f4-0c46-45c2-ab12-2cbe7f07ff20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_e2f8107a-0136-4271-b124-5f5753774f1f" xlink:href="din-20211231.xsd#din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_759310c6-3b0a-489e-8f96-768f5842c8b6" xlink:to="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_e2f8107a-0136-4271-b124-5f5753774f1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_1d0ebfd4-049b-4448-86a3-9582a9fa43db" xlink:href="din-20211231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_759310c6-3b0a-489e-8f96-768f5842c8b6" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_1d0ebfd4-049b-4448-86a3-9582a9fa43db" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#LongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LongTermDebtNarrativeDetails" xlink:type="extended" id="i55bca588fb10420aaab174d41fc82536_LongTermDebtNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_141fa50d-80a9-452e-a5cf-cd941f9615ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_141fa50d-80a9-452e-a5cf-cd941f9615ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_4040c7c7-1778-4e05-a2dc-e48b7316bd17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_4040c7c7-1778-4e05-a2dc-e48b7316bd17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentCovenantComplianceRatioOfIndebtednessToNetCapitalMaximum_2867e5db-2e7e-49f3-be3f-af2859377afc" xlink:href="din-20211231.xsd#din_DebtInstrumentCovenantComplianceRatioOfIndebtednessToNetCapitalMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtInstrumentCovenantComplianceRatioOfIndebtednessToNetCapitalMaximum_2867e5db-2e7e-49f3-be3f-af2859377afc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RatioOfIndebtednessToNetCapital1_68243a0d-4ebd-4637-be0f-b30bd30f25f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RatioOfIndebtednessToNetCapital1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_RatioOfIndebtednessToNetCapital1_68243a0d-4ebd-4637-be0f-b30bd30f25f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RepaymentsOfDebtPrinciple_3ba959cb-3edb-4721-8ef5-72031829b41b" xlink:href="din-20211231.xsd#din_RepaymentsOfDebtPrinciple"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_RepaymentsOfDebtPrinciple_3ba959cb-3edb-4721-8ef5-72031829b41b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentMakeWholePremium_7c0febbd-43a3-424b-8b8e-e84e989b50ae" xlink:href="din-20211231.xsd#din_DebtInstrumentMakeWholePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtInstrumentMakeWholePremium_7c0febbd-43a3-424b-8b8e-e84e989b50ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentAdditionalInterestOnFixedRate_c34743b8-fa78-46a0-ac60-34702bfc1c66" xlink:href="din-20211231.xsd#din_DebtInstrumentAdditionalInterestOnFixedRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtInstrumentAdditionalInterestOnFixedRate_c34743b8-fa78-46a0-ac60-34702bfc1c66" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_56c23a1e-9b3b-4823-a222-d5645faab007" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentTerm_56c23a1e-9b3b-4823-a222-d5645faab007" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_513891e0-bdb1-4845-af45-f26031ca9df3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_513891e0-bdb1-4845-af45-f26031ca9df3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6dde28cc-b908-411e-a043-bb7b8203ff46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_6dde28cc-b908-411e-a043-bb7b8203ff46" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_87f5f701-263d-467c-a8bd-1ecc8b64b885" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_87f5f701-263d-467c-a8bd-1ecc8b64b885" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentNumberOfExtensions_ff465d7b-515f-42ea-83d0-52feb9bc88da" xlink:href="din-20211231.xsd#din_DebtInstrumentNumberOfExtensions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtInstrumentNumberOfExtensions_ff465d7b-515f-42ea-83d0-52feb9bc88da" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtInstrumentExtensionPeriod_17ab428a-f024-4292-9d9a-6dd0bedb1788" xlink:href="din-20211231.xsd#din_DebtInstrumentExtensionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtInstrumentExtensionPeriod_17ab428a-f024-4292-9d9a-6dd0bedb1788" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatioCashSweepingEvent_305864ef-b92e-4d5f-81c4-eda0f14ed745" xlink:href="din-20211231.xsd#din_DebtServiceCoverageRatioCashSweepingEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtServiceCoverageRatioCashSweepingEvent_305864ef-b92e-4d5f-81c4-eda0f14ed745" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatioRapidAmortizationEvent_dd7141f1-ab49-4533-b6a3-e5cd593549b3" xlink:href="din-20211231.xsd#din_DebtServiceCoverageRatioRapidAmortizationEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtServiceCoverageRatioRapidAmortizationEvent_dd7141f1-ab49-4533-b6a3-e5cd593549b3" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent_fb344709-66c6-4b5b-8484-7089630292ff" xlink:href="din-20211231.xsd#din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_InterestOnlyDebtServiceCoverageRatioManagerTerminationEvent_fb344709-66c6-4b5b-8484-7089630292ff" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_InterestOnlyDebtServiceCoverageRatioDefaultEvent_db60f7a4-a105-41b9-8b34-275f7abac600" xlink:href="din-20211231.xsd#din_InterestOnlyDebtServiceCoverageRatioDefaultEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_InterestOnlyDebtServiceCoverageRatioDefaultEvent_db60f7a4-a105-41b9-8b34-275f7abac600" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DebtServiceCoverageRatio_28745699-456b-4c44-aad4-91373ecb3f5a" xlink:href="din-20211231.xsd#din_DebtServiceCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_DebtServiceCoverageRatio_28745699-456b-4c44-aad4-91373ecb3f5a" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_4b3acbd4-18fa-47de-babf-134328577db7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_4b3acbd4-18fa-47de-babf-134328577db7" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_2636df62-e16e-47c3-a82e-fc2bce91ef0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_2636df62-e16e-47c3-a82e-fc2bce91ef0a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_34e9bbdd-41e5-4437-a9d1-de1cb5686cb6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod_34e9bbdd-41e5-4437-a9d1-de1cb5686cb6" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_ea836979-527d-49bc-aa6a-95b7e91f3fa8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_LineOfCredit_ea836979-527d-49bc-aa6a-95b7e91f3fa8" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LineOfCreditFacilityPercentageOfAdvancesDrawn_a695e763-9ab2-47ce-9dfc-04307232ab1e" xlink:href="din-20211231.xsd#din_LineOfCreditFacilityPercentageOfAdvancesDrawn"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_din_LineOfCreditFacilityPercentageOfAdvancesDrawn_a695e763-9ab2-47ce-9dfc-04307232ab1e" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_364f4f3f-5801-4499-afb6-609cfc9c2dc0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_364f4f3f-5801-4499-afb6-609cfc9c2dc0" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_7b6d4db1-51dd-4853-8b0e-15aca9f1a963" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_7b6d4db1-51dd-4853-8b0e-15aca9f1a963" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4fe42428-2f52-40d4-841f-51f300061078" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_4fe42428-2f52-40d4-841f-51f300061078" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_63a8117c-fa51-4e62-a95c-1d90eb49db46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_63a8117c-fa51-4e62-a95c-1d90eb49db46" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_e557c158-940d-479f-8b05-07dc8227bcdf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_e557c158-940d-479f-8b05-07dc8227bcdf" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_194fc985-40ab-4bc4-82f8-4566d30f6ce8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_194fc985-40ab-4bc4-82f8-4566d30f6ce8" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_be0df27c-7a01-466c-be76-a88b8d5a38d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_be0df27c-7a01-466c-be76-a88b8d5a38d8" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_83970aca-ca5f-4460-b886-04c303be6b85" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_83970aca-ca5f-4460-b886-04c303be6b85" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_07a815fc-2348-4860-86f5-8152725494aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_07a815fc-2348-4860-86f5-8152725494aa" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAnnualPrincipalPayment_549e2830-3fb2-468b-9373-90056c772f9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAnnualPrincipalPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentAnnualPrincipalPayment_549e2830-3fb2-468b-9373-90056c772f9b" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_a4c0b6df-fe37-44c5-93e9-78dfbc109162" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa0b72ab-1f56-48f7-aa95-67ea2d4713ad" xlink:to="loc_us-gaap_DebtInstrumentTable_a4c0b6df-fe37-44c5-93e9-78dfbc109162" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_0ba41908-c588-4ba6-a686-2db5e17259ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a4c0b6df-fe37-44c5-93e9-78dfbc109162" xlink:to="loc_us-gaap_DebtInstrumentAxis_0ba41908-c588-4ba6-a686-2db5e17259ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0ba41908-c588-4ba6-a686-2db5e17259ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_0ba41908-c588-4ba6-a686-2db5e17259ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0ba41908-c588-4ba6-a686-2db5e17259ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_0ba41908-c588-4ba6-a686-2db5e17259ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_A2019ClassA2IAnd2019ClassA2IINotesMember_95fab91a-c885-47b7-83b4-557eaf1fcd2b" xlink:href="din-20211231.xsd#din_A2019ClassA2IAnd2019ClassA2IINotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:to="loc_din_A2019ClassA2IAnd2019ClassA2IINotesMember_95fab91a-c885-47b7-83b4-557eaf1fcd2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_748d53f7-1fbf-4b9e-b35a-f18511266b5e" xlink:href="din-20211231.xsd#din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_A2019ClassA2IAnd2019ClassA2IINotesMember_95fab91a-c885-47b7-83b4-557eaf1fcd2b" xlink:to="loc_din_Series201914.194FixedRateSeniorSecuredNotesClassA2IMember_748d53f7-1fbf-4b9e-b35a-f18511266b5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_129df73d-f9bc-4c4b-b489-ffe9ea41b088" xlink:href="din-20211231.xsd#din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_A2019ClassA2IAnd2019ClassA2IINotesMember_95fab91a-c885-47b7-83b4-557eaf1fcd2b" xlink:to="loc_din_Series201914.723FixedRateSeniorSecuredNotesClassA2IIMember_129df73d-f9bc-4c4b-b489-ffe9ea41b088" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_57fb1dea-ec2f-4247-ac78-1558a4c9764b" xlink:href="din-20211231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_57fb1dea-ec2f-4247-ac78-1558a4c9764b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20181VariableFundingSeniorNotesClassA1Member_eae3fb53-aee1-4279-abf2-bafbaf6b5154" xlink:href="din-20211231.xsd#din_Series20181VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:to="loc_din_Series20181VariableFundingSeniorNotesClassA1Member_eae3fb53-aee1-4279-abf2-bafbaf6b5154" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember_300c30b8-fb64-45be-8bd3-ab854b0fa921" xlink:href="din-20211231.xsd#din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8abccde4-2c6a-447e-afbf-b1f0c081788a" xlink:to="loc_din_Series20141ClassA24.227FixedRateSeniorSecuredNotesMember_300c30b8-fb64-45be-8bd3-ab854b0fa921" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_8af8e275-fa95-4a93-ace1-9b0d6aea024a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a4c0b6df-fe37-44c5-93e9-78dfbc109162" xlink:to="loc_us-gaap_CreditFacilityAxis_8af8e275-fa95-4a93-ace1-9b0d6aea024a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_8af8e275-fa95-4a93-ace1-9b0d6aea024a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_8af8e275-fa95-4a93-ace1-9b0d6aea024a" xlink:to="loc_us-gaap_CreditFacilityDomain_8af8e275-fa95-4a93-ace1-9b0d6aea024a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_49265ed9-f9c2-40af-989f-c423eb1e7a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_8af8e275-fa95-4a93-ace1-9b0d6aea024a" xlink:to="loc_us-gaap_CreditFacilityDomain_49265ed9-f9c2-40af-989f-c423eb1e7a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_97cde6b6-5380-4004-a579-774c95f96ddf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_49265ed9-f9c2-40af-989f-c423eb1e7a7b" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_97cde6b6-5380-4004-a579-774c95f96ddf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_775f762d-fc27-40df-b125-d3a8fdf60dff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_49265ed9-f9c2-40af-989f-c423eb1e7a7b" xlink:to="loc_us-gaap_LetterOfCreditMember_775f762d-fc27-40df-b125-d3a8fdf60dff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_508665bc-3c29-43e3-953f-058b6bfc157d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a4c0b6df-fe37-44c5-93e9-78dfbc109162" xlink:to="loc_us-gaap_VariableRateAxis_508665bc-3c29-43e3-953f-058b6bfc157d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_508665bc-3c29-43e3-953f-058b6bfc157d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_508665bc-3c29-43e3-953f-058b6bfc157d" xlink:to="loc_us-gaap_VariableRateDomain_508665bc-3c29-43e3-953f-058b6bfc157d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_508665bc-3c29-43e3-953f-058b6bfc157d" xlink:to="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UsTreasuryUstInterestRateMember_008d6988-ed4c-4d88-a14e-d36ef18c0417" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UsTreasuryUstInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_us-gaap_UsTreasuryUstInterestRateMember_008d6988-ed4c-4d88-a14e-d36ef18c0417" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EurodollarMember_99477a4f-7288-4eb8-97c9-46c157b649ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EurodollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_us-gaap_EurodollarMember_99477a4f-7288-4eb8-97c9-46c157b649ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_138aecc4-d352-4b38-8c07-1bd25f363349" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_us-gaap_BaseRateMember_138aecc4-d352-4b38-8c07-1bd25f363349" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_13918575-d49a-42e3-a828-d44ea2658004" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_13918575-d49a-42e3-a828-d44ea2658004" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_eb12b432-1050-4e8c-8aee-475ef630572c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_eb12b432-1050-4e8c-8aee-475ef630572c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CommercialPaperFundingRateOfConduitInvestorMember_b2de4ec5-fce7-4b24-899b-922aabcc2fab" xlink:href="din-20211231.xsd#din_CommercialPaperFundingRateOfConduitInvestorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_38c0843e-b3ef-4178-b824-b36b19fbf3c5" xlink:to="loc_din_CommercialPaperFundingRateOfConduitInvestorMember_b2de4ec5-fce7-4b24-899b-922aabcc2fab" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/FinancingObligationsNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#FinancingObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/FinancingObligationsNarrativeDetails" xlink:type="extended" id="i8bcdcabf7d70440bafde14c54290e1ea_FinancingObligationsNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction_0bdcafd3-04fb-4bca-864f-c46105b1200a" xlink:href="din-20211231.xsd#din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_ParcelsOfRealPropertyUnderSaleLeasebackTransaction_0bdcafd3-04fb-4bca-864f-c46105b1200a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionHistoricalCost_1946ac6f-2060-4c70-b5a2-a180a2c6e947" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionHistoricalCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_us-gaap_SaleLeasebackTransactionHistoricalCost_1946ac6f-2060-4c70-b5a2-a180a2c6e947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackInitialTerm_0d22a546-9c6f-4f24-8ba5-d04ed6570db6" xlink:href="din-20211231.xsd#din_SaleLeasebackInitialTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_SaleLeasebackInitialTerm_0d22a546-9c6f-4f24-8ba5-d04ed6570db6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfOptionsToExtendInitialSaleLeasebackTerm_01b83704-ab53-4786-acbb-9f230556675e" xlink:href="din-20211231.xsd#din_NumberOfOptionsToExtendInitialSaleLeasebackTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_NumberOfOptionsToExtendInitialSaleLeasebackTerm_01b83704-ab53-4786-acbb-9f230556675e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears_edc7bc9b-1b9b-42fb-b716-25a435444da0" xlink:href="din-20211231.xsd#din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_ExtensionsPeriodForOptionToExtendSaleLeasebackInitialTermInYears_edc7bc9b-1b9b-42fb-b716-25a435444da0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_PropertiesAssignedToFranchiseeOrReleasedFromLessor_40abe849-728b-4d31-b71b-8725d170542f" xlink:href="din-20211231.xsd#din_PropertiesAssignedToFranchiseeOrReleasedFromLessor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_PropertiesAssignedToFranchiseeOrReleasedFromLessor_40abe849-728b-4d31-b71b-8725d170542f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions_5eea056a-82e6-4552-8b09-48e66fefe5d0" xlink:href="din-20211231.xsd#din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_din_ReductionInPropertyAndEquipmentAndFinancingObligationsAsResultOfSalesTransactions_5eea056a-82e6-4552-8b09-48e66fefe5d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionTable_16385208-b2e5-4ed6-ad2c-4381500a276e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_ec0d9304-7865-42d8-8183-3bb62cde3da6" xlink:to="loc_us-gaap_SaleLeasebackTransactionTable_16385208-b2e5-4ed6-ad2c-4381500a276e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_621c84f1-a789-40d3-9a7b-7b9601d3e012" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SaleLeasebackTransactionTable_16385208-b2e5-4ed6-ad2c-4381500a276e" xlink:to="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_621c84f1-a789-40d3-9a7b-7b9601d3e012" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_621c84f1-a789-40d3-9a7b-7b9601d3e012_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_621c84f1-a789-40d3-9a7b-7b9601d3e012" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_621c84f1-a789-40d3-9a7b-7b9601d3e012_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_4bef35d4-af43-4748-81fd-25917fd59bff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_621c84f1-a789-40d3-9a7b-7b9601d3e012" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_4bef35d4-af43-4748-81fd-25917fd59bff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackTransactionAgreementForPropertiesMember_a134139a-a29d-45c3-b550-7e98b709b07d" xlink:href="din-20211231.xsd#din_SaleLeasebackTransactionAgreementForPropertiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_4bef35d4-af43-4748-81fd-25917fd59bff" xlink:to="loc_din_SaleLeasebackTransactionAgreementForPropertiesMember_a134139a-a29d-45c3-b550-7e98b709b07d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_MasterLeaseAgreementMember_7f4470c6-7e8d-4e6e-9b27-b1e9807c4937" xlink:href="din-20211231.xsd#din_MasterLeaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_4bef35d4-af43-4748-81fd-25917fd59bff" xlink:to="loc_din_MasterLeaseAgreementMember_7f4470c6-7e8d-4e6e-9b27-b1e9807c4937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackTransactionsMember_72dd1a90-2c18-48e3-a6bd-b0661d8ea147" xlink:href="din-20211231.xsd#din_SaleLeasebackTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_4bef35d4-af43-4748-81fd-25917fd59bff" xlink:to="loc_din_SaleLeasebackTransactionsMember_72dd1a90-2c18-48e3-a6bd-b0661d8ea147" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/FinancingObligationsFutureMinimumLeasePaymentsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#FinancingObligationsFutureMinimumLeasePaymentsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/FinancingObligationsFutureMinimumLeasePaymentsDetails" xlink:type="extended" id="ia4edb84b4a61451b98860ff9c52e4969_FinancingObligationsFutureMinimumLeasePaymentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_f62832ac-97d7-492f-a656-85de78268bc8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_f62832ac-97d7-492f-a656-85de78268bc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_a94f667e-e19d-4c4a-8d33-b6ae7c6cfe7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_a94f667e-e19d-4c4a-8d33-b6ae7c6cfe7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_46df7fa1-bc29-4158-a41e-49f544244a30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_46df7fa1-bc29-4158-a41e-49f544244a30" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_6903ed26-1c7b-4ce9-ae40-8248ea16fa41" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_6903ed26-1c7b-4ce9-ae40-8248ea16fa41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_7e50f56e-a92c-43df-a368-2ffcc822de46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_7e50f56e-a92c-43df-a368-2ffcc822de46" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_2a1fa5ae-38a4-4e54-a452-d290ae8327cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_2a1fa5ae-38a4-4e54-a452-d290ae8327cd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_eeaa4618-d1af-4510-af4b-c452262ff052" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_eeaa4618-d1af-4510-af4b-c452262ff052" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_60920109-8ef1-4a87-b01c-49d87cc2efef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_60920109-8ef1-4a87-b01c-49d87cc2efef" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_e2f160ef-4b7d-45a4-9ae0-c23c6b0c25de" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiability_e2f160ef-4b7d-45a4-9ae0-c23c6b0c25de" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_b0e27530-f57c-456d-a961-ee6eae83cb69" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_b0e27530-f57c-456d-a961-ee6eae83cb69" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_5aebcace-8938-47ed-83ad-4e98df7c15af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_5aebcace-8938-47ed-83ad-4e98df7c15af" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionTable_9aa6a0fd-d73e-464e-887d-889f236df471" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SaleLeasebackTransactionLineItems_867f850b-a464-42c3-8335-110ee71feb14" xlink:to="loc_us-gaap_SaleLeasebackTransactionTable_9aa6a0fd-d73e-464e-887d-889f236df471" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_d79e859b-ebb2-423b-8012-844e7cff08ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SaleLeasebackTransactionTable_9aa6a0fd-d73e-464e-887d-889f236df471" xlink:to="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_d79e859b-ebb2-423b-8012-844e7cff08ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_d79e859b-ebb2-423b-8012-844e7cff08ca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_d79e859b-ebb2-423b-8012-844e7cff08ca" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_d79e859b-ebb2-423b-8012-844e7cff08ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleLeasebackTransactionNameDomain_23440e63-8521-4cff-97c3-b5988d2fb564" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleLeasebackTransactionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SaleLeasebackTransactionDescriptionAxis_d79e859b-ebb2-423b-8012-844e7cff08ca" xlink:to="loc_us-gaap_SaleLeasebackTransactionNameDomain_23440e63-8521-4cff-97c3-b5988d2fb564" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SaleLeasebackTransactionsMember_537da67e-4a1a-4edd-95e7-b268711fb7ac" xlink:href="din-20211231.xsd#din_SaleLeasebackTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleLeasebackTransactionNameDomain_23440e63-8521-4cff-97c3-b5988d2fb564" xlink:to="loc_din_SaleLeasebackTransactionsMember_537da67e-4a1a-4edd-95e7-b268711fb7ac" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/LeaseDisclosuresNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#LeaseDisclosuresNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/LeaseDisclosuresNarrativeDetails" xlink:type="extended" id="i03277272b7564347a11efa1027e3d3d6_LeaseDisclosuresNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LesseeNumberofFranchiseeoperatedRestaurants_3e163331-79b6-4e85-b84b-c9bb5c8620f7" xlink:href="din-20211231.xsd#din_LesseeNumberofFranchiseeoperatedRestaurants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_din_LesseeNumberofFranchiseeoperatedRestaurants_3e163331-79b6-4e85-b84b-c9bb5c8620f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LessorNumberofPropertiesLeased_c23f056e-81b9-4c36-8205-3a777b42e193" xlink:href="din-20211231.xsd#din_LessorNumberofPropertiesLeased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_din_LessorNumberofPropertiesLeased_c23f056e-81b9-4c36-8205-3a777b42e193" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties_43fc7ad7-4004-4934-9c18-762003c2bca5" xlink:href="din-20211231.xsd#din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_din_NumberOfCompanyOperatedRestaurantsLocatedOnLeasedRealEstateProperties_43fc7ad7-4004-4934-9c18-762003c2bca5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_75bb2012-7cd8-4aa5-8f30-8470ff3fb2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_75bb2012-7cd8-4aa5-8f30-8470ff3fb2c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_c8cc1dff-93ef-4cf1-8146-024455b8d4c4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_c8cc1dff-93ef-4cf1-8146-024455b8d4c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_ceb44171-5743-42bb-9f27-89874c928ecd" xlink:href="din-20211231.xsd#din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_din_LessorNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_ceb44171-5743-42bb-9f27-89874c928ecd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_6579aa62-2f67-4783-a1f7-e5874a55781a" xlink:href="din-20211231.xsd#din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_din_LesseeNumberofLeasesRequiringAdditionalRentPaymentsBasedOnAPercentageOfRestaurantSales_6579aa62-2f67-4783-a1f7-e5874a55781a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_06e29f70-5eda-4184-91d2-76285938026b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_06e29f70-5eda-4184-91d2-76285938026b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_4ec90657-7daf-4d27-86de-d0cda6f0406d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_4ec90657-7daf-4d27-86de-d0cda6f0406d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_ee851c85-9735-4613-97ec-8a37acd62df6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_ee851c85-9735-4613-97ec-8a37acd62df6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_7045931d-e94d-4840-b306-5d1f56653a43" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_7045931d-e94d-4840-b306-5d1f56653a43" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_271d5ee6-6dd9-49eb-b048-ad3e71cdcc79" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_cc1b0eea-dc63-47e1-95c7-3c628a2dc609" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_271d5ee6-6dd9-49eb-b048-ad3e71cdcc79" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_88f249a5-1d3f-4ac6-8dc2-9479b2200b16" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_271d5ee6-6dd9-49eb-b048-ad3e71cdcc79" xlink:to="loc_dei_LegalEntityAxis_88f249a5-1d3f-4ac6-8dc2-9479b2200b16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_88f249a5-1d3f-4ac6-8dc2-9479b2200b16_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_88f249a5-1d3f-4ac6-8dc2-9479b2200b16" xlink:to="loc_dei_EntityDomain_88f249a5-1d3f-4ac6-8dc2-9479b2200b16_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4a7c4d94-0ce6-4e39-aa66-460e75e01079" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_88f249a5-1d3f-4ac6-8dc2-9479b2200b16" xlink:to="loc_dei_EntityDomain_4a7c4d94-0ce6-4e39-aa66-460e75e01079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_24cd63ae-9d49-413b-89f8-98eb9f37dfc9" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4a7c4d94-0ce6-4e39-aa66-460e75e01079" xlink:to="loc_din_IhopMember_24cd63ae-9d49-413b-89f8-98eb9f37dfc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_a10bd4c6-f76b-4a27-a183-5aa014760631" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4a7c4d94-0ce6-4e39-aa66-460e75e01079" xlink:to="loc_din_ApplebeesMember_a10bd4c6-f76b-4a27-a183-5aa014760631" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1b80d443-ef8b-43ef-89c1-171c49014981" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_271d5ee6-6dd9-49eb-b048-ad3e71cdcc79" xlink:to="loc_srt_RangeAxis_1b80d443-ef8b-43ef-89c1-171c49014981" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1b80d443-ef8b-43ef-89c1-171c49014981_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1b80d443-ef8b-43ef-89c1-171c49014981" xlink:to="loc_srt_RangeMember_1b80d443-ef8b-43ef-89c1-171c49014981_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7d3b43fc-7f8f-4d83-a19d-747f60db9ea9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1b80d443-ef8b-43ef-89c1-171c49014981" xlink:to="loc_srt_RangeMember_7d3b43fc-7f8f-4d83-a19d-747f60db9ea9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_5b101c6f-88db-4600-837a-c931d7c5e0e3" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_7d3b43fc-7f8f-4d83-a19d-747f60db9ea9" xlink:to="loc_srt_MinimumMember_5b101c6f-88db-4600-837a-c931d7c5e0e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_96282344-c2f5-4f9e-9db5-574cc291ebc1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_7d3b43fc-7f8f-4d83-a19d-747f60db9ea9" xlink:to="loc_srt_MaximumMember_96282344-c2f5-4f9e-9db5-574cc291ebc1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/CommitmentsandContingenciesDetails" xlink:type="extended" id="iaf7a6e94e4c4460f9dd5ee4c3a94a292_CommitmentsandContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_fed6bd3a-f477-453e-a203-9d16578b8b0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_fed6bd3a-f477-453e-a203-9d16578b8b0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_07afbdb6-8dca-444f-8ec2-90d6e7ebc060" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_07afbdb6-8dca-444f-8ec2-90d6e7ebc060" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue_4275d451-cace-45b8-b631-11855e01e592" xlink:href="din-20211231.xsd#din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:to="loc_din_LeaseGuaranteesExcludingUnexercisedOptionPeriodsFutureMinimumPaymentsDue_4275d451-cace-45b8-b631-11855e01e592" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3ea912cf-f62b-435d-a4ff-c8ed30b926ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3ea912cf-f62b-435d-a4ff-c8ed30b926ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_473c61f8-9793-4668-b9eb-56d9536bd3c9" xlink:to="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_a9b60d5d-e2c5-4e59-8df2-89a51a1e9382" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_4684e5b9-f7d0-48b4-862b-bebcbc8d74aa" xlink:to="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_a9b60d5d-e2c5-4e59-8df2-89a51a1e9382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_71c85a27-7a10-4a7c-b1f8-c7eed6c49ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseCommitmentExcludingLongtermCommitmentDomain_a9b60d5d-e2c5-4e59-8df2-89a51a1e9382" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_71c85a27-7a10-4a7c-b1f8-c7eed6c49ab9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2aa49a2d-ad28-465f-8363-af4367c637fc" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:to="loc_dei_LegalEntityAxis_2aa49a2d-ad28-465f-8363-af4367c637fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2aa49a2d-ad28-465f-8363-af4367c637fc_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2aa49a2d-ad28-465f-8363-af4367c637fc" xlink:to="loc_dei_EntityDomain_2aa49a2d-ad28-465f-8363-af4367c637fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3d450e0e-b769-4b9c-aa7b-6bb1061f5a6a" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2aa49a2d-ad28-465f-8363-af4367c637fc" xlink:to="loc_dei_EntityDomain_3d450e0e-b769-4b9c-aa7b-6bb1061f5a6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_fc167e7c-0a82-45f3-8f15-deeac0e2e77a" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3d450e0e-b769-4b9c-aa7b-6bb1061f5a6a" xlink:to="loc_din_ApplebeesMember_fc167e7c-0a82-45f3-8f15-deeac0e2e77a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_4f8bbc1b-104f-4c56-8a45-837d118f6de9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_4f8bbc1b-104f-4c56-8a45-837d118f6de9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_4f8bbc1b-104f-4c56-8a45-837d118f6de9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_4f8bbc1b-104f-4c56-8a45-837d118f6de9" xlink:to="loc_us-gaap_LossContingencyNatureDomain_4f8bbc1b-104f-4c56-8a45-837d118f6de9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_a7f9fc07-9eea-493c-81c0-8c88710f067a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_4f8bbc1b-104f-4c56-8a45-837d118f6de9" xlink:to="loc_us-gaap_LossContingencyNatureDomain_a7f9fc07-9eea-493c-81c0-8c88710f067a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyLeaseGuaranteeMember_8adb26c4-33f0-4fbb-84a4-fb24a983f7dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyLeaseGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_a7f9fc07-9eea-493c-81c0-8c88710f067a" xlink:to="loc_us-gaap_PropertyLeaseGuaranteeMember_8adb26c4-33f0-4fbb-84a4-fb24a983f7dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_15857c87-38fa-4807-b760-a9fc862ec4d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:to="loc_us-gaap_CreditFacilityAxis_15857c87-38fa-4807-b760-a9fc862ec4d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_15857c87-38fa-4807-b760-a9fc862ec4d5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_15857c87-38fa-4807-b760-a9fc862ec4d5" xlink:to="loc_us-gaap_CreditFacilityDomain_15857c87-38fa-4807-b760-a9fc862ec4d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_214b3c5e-2d22-4d27-b5e0-af716bee6344" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_15857c87-38fa-4807-b760-a9fc862ec4d5" xlink:to="loc_us-gaap_CreditFacilityDomain_214b3c5e-2d22-4d27-b5e0-af716bee6344" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_65562828-e64a-4ae2-8ad9-637162acd37f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_214b3c5e-2d22-4d27-b5e0-af716bee6344" xlink:to="loc_us-gaap_LetterOfCreditMember_65562828-e64a-4ae2-8ad9-637162acd37f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_e4194d0d-c2f9-4995-95c2-c7679c9108f7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_a85f634e-ba6d-42ba-a804-304e21abedf7" xlink:to="loc_us-gaap_DebtInstrumentAxis_e4194d0d-c2f9-4995-95c2-c7679c9108f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e4194d0d-c2f9-4995-95c2-c7679c9108f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_e4194d0d-c2f9-4995-95c2-c7679c9108f7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e4194d0d-c2f9-4995-95c2-c7679c9108f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9e1a2819-9b40-4eb3-b0e6-e0cd236bdd00" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_e4194d0d-c2f9-4995-95c2-c7679c9108f7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9e1a2819-9b40-4eb3-b0e6-e0cd236bdd00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_f6772bd5-ee19-48e7-a7f8-5e80cfa8e16c" xlink:href="din-20211231.xsd#din_Series20191VariableFundingSeniorNotesClassA1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_9e1a2819-9b40-4eb3-b0e6-e0cd236bdd00" xlink:to="loc_din_Series20191VariableFundingSeniorNotesClassA1Member_f6772bd5-ee19-48e7-a7f8-5e80cfa8e16c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockholdersDeficitNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitNarrativeDetails" xlink:type="extended" id="i17aa48e0b32a4e179b0982c4457c618e_StockholdersDeficitNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_d5d956e5-966c-4e44-9d3f-eb19fbb8c2f7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_d5d956e5-966c-4e44-9d3f-eb19fbb8c2f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_e1dad536-c532-4a87-8b39-b791bcf2a5c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_e1dad536-c532-4a87-8b39-b791bcf2a5c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_88e70203-4403-4473-987c-4559325b3b68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_88e70203-4403-4473-987c-4559325b3b68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_7645e63e-4e0b-4e40-a50c-be2bc66c24cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_7645e63e-4e0b-4e40-a50c-be2bc66c24cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_d2eea2e6-973c-4807-9d95-5ffb9a2bd02c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_a6d8db37-b6df-46c2-9f56-2aad0be1e8fe" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_d2eea2e6-973c-4807-9d95-5ffb9a2bd02c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_7d915276-3255-4d18-a4dd-cac150ab0f49" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_d2eea2e6-973c-4807-9d95-5ffb9a2bd02c" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_7d915276-3255-4d18-a4dd-cac150ab0f49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_7d915276-3255-4d18-a4dd-cac150ab0f49_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_7d915276-3255-4d18-a4dd-cac150ab0f49" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_7d915276-3255-4d18-a4dd-cac150ab0f49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_415076f0-b232-4ab4-8333-fd33091491db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_7d915276-3255-4d18-a4dd-cac150ab0f49" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_415076f0-b232-4ab4-8333-fd33091491db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandNineteenRepurchaseProgramMember_629f98a0-899c-45c0-8d98-d0c5ed8fddaf" xlink:href="din-20211231.xsd#din_TwoThousandNineteenRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_415076f0-b232-4ab4-8333-fd33091491db" xlink:to="loc_din_TwoThousandNineteenRepurchaseProgramMember_629f98a0-899c-45c0-8d98-d0c5ed8fddaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandFifteenAuthorizationMember_5f16815c-03b4-42c1-be45-603f0cf35147" xlink:href="din-20211231.xsd#din_TwoThousandFifteenAuthorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_415076f0-b232-4ab4-8333-fd33091491db" xlink:to="loc_din_TwoThousandFifteenAuthorizationMember_5f16815c-03b4-42c1-be45-603f0cf35147" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e2e6b281-e3e7-49ab-9667-7016b96904cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_d2eea2e6-973c-4807-9d95-5ffb9a2bd02c" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e2e6b281-e3e7-49ab-9667-7016b96904cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e2e6b281-e3e7-49ab-9667-7016b96904cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2e6b281-e3e7-49ab-9667-7016b96904cc" xlink:to="loc_us-gaap_EquityComponentDomain_e2e6b281-e3e7-49ab-9667-7016b96904cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_44849e68-f06b-4359-bd14-314d35be974b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2e6b281-e3e7-49ab-9667-7016b96904cc" xlink:to="loc_us-gaap_EquityComponentDomain_44849e68-f06b-4359-bd14-314d35be974b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_8128220f-1c81-412e-8f17-fd0ecc1f95b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_44849e68-f06b-4359-bd14-314d35be974b" xlink:to="loc_us-gaap_TreasuryStockMember_8128220f-1c81-412e-8f17-fd0ecc1f95b6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitShareRepurchasesDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockholdersDeficitShareRepurchasesDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitShareRepurchasesDetails" xlink:type="extended" id="id7d9c81c9b7642e992ad0b506678331e_StockholdersDeficitShareRepurchasesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_3cc7ab5f-d922-4e52-be4c-042630933e61" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_3cc7ab5f-d922-4e52-be4c-042630933e61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_884953eb-7693-420b-b078-22c8ec68b751" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_884953eb-7693-420b-b078-22c8ec68b751" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CumulativeAmountOfSharesRepurchased_466a9b48-54ad-49b2-970c-f44fe5cf6416" xlink:href="din-20211231.xsd#din_CumulativeAmountOfSharesRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_din_CumulativeAmountOfSharesRepurchased_466a9b48-54ad-49b2-970c-f44fe5cf6416" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CumulativePaymentsForRepurchaseOfCommonStock_72e92ca7-8818-4428-89a8-d099887ef080" xlink:href="din-20211231.xsd#din_CumulativePaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_din_CumulativePaymentsForRepurchaseOfCommonStock_72e92ca7-8818-4428-89a8-d099887ef080" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_6f5cbeb2-753a-4de7-83eb-6a52c0902f56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_6f5cbeb2-753a-4de7-83eb-6a52c0902f56" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_0e48fd57-7797-4aea-8449-325fed660942" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_55daf511-3a2c-4d96-ab07-1e04664fe582" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_0e48fd57-7797-4aea-8449-325fed660942" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_227f40da-7629-4236-9acb-57ba512d603f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_0e48fd57-7797-4aea-8449-325fed660942" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_227f40da-7629-4236-9acb-57ba512d603f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_227f40da-7629-4236-9acb-57ba512d603f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_227f40da-7629-4236-9acb-57ba512d603f" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_227f40da-7629-4236-9acb-57ba512d603f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_8c629a7f-9d00-4448-8976-48873c424464" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_227f40da-7629-4236-9acb-57ba512d603f" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_8c629a7f-9d00-4448-8976-48873c424464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandNineteenRepurchaseProgramMember_1bc69e51-e00d-49e1-92bd-eadba1634011" xlink:href="din-20211231.xsd#din_TwoThousandNineteenRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_8c629a7f-9d00-4448-8976-48873c424464" xlink:to="loc_din_TwoThousandNineteenRepurchaseProgramMember_1bc69e51-e00d-49e1-92bd-eadba1634011" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OctoberTwoThousandFifteenShareRepurchaseProgramMember_997e0dbb-edc3-4656-8441-a432b722b726" xlink:href="din-20211231.xsd#din_OctoberTwoThousandFifteenShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_8c629a7f-9d00-4448-8976-48873c424464" xlink:to="loc_din_OctoberTwoThousandFifteenShareRepurchaseProgramMember_997e0dbb-edc3-4656-8441-a432b722b726" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockholdersDeficitScheduleofDividendsDeclaredDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockholdersDeficitScheduleofDividendsDeclaredDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockholdersDeficitScheduleofDividendsDeclaredDetails" xlink:type="extended" id="i4fdaef8c3730446cbca69cdd28163c6a_StockholdersDeficitScheduleofDividendsDeclaredDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems_e69bdb2a-c1ba-415e-8808-68f176aa0407" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_2c0675d9-1b95-4e15-9449-d42f085115e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_e69bdb2a-c1ba-415e-8808-68f176aa0407" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_2c0675d9-1b95-4e15-9449-d42f085115e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_72055d16-2971-4289-b4eb-b634464e09fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_e69bdb2a-c1ba-415e-8808-68f176aa0407" xlink:to="loc_us-gaap_CommonStockDividendsPerShareCashPaid_72055d16-2971-4289-b4eb-b634464e09fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_c8b37031-31ab-48a1-bc2d-2e72f3fb2903" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_e69bdb2a-c1ba-415e-8808-68f176aa0407" xlink:to="loc_us-gaap_PaymentsOfDividends_c8b37031-31ab-48a1-bc2d-2e72f3fb2903" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable_90fdc566-0a24-443f-8a34-2f1d236c64c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DividendsPayableLineItems_e69bdb2a-c1ba-415e-8808-68f176aa0407" xlink:to="loc_us-gaap_DividendsPayableTable_90fdc566-0a24-443f-8a34-2f1d236c64c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_b7229d1d-d561-46dd-8e66-91f66ab374a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_90fdc566-0a24-443f-8a34-2f1d236c64c9" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_b7229d1d-d561-46dd-8e66-91f66ab374a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_b7229d1d-d561-46dd-8e66-91f66ab374a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b7229d1d-d561-46dd-8e66-91f66ab374a7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_b7229d1d-d561-46dd-8e66-91f66ab374a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_48c7860f-6f37-45b6-be61-cb84823c5ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b7229d1d-d561-46dd-8e66-91f66ab374a7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_48c7860f-6f37-45b6-be61-cb84823c5ac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_5a1aef69-eb48-4df4-a25c-59d50bb4b13b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_48c7860f-6f37-45b6-be61-cb84823c5ac8" xlink:to="loc_us-gaap_SubsequentEventMember_5a1aef69-eb48-4df4-a25c-59d50bb4b13b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/ClosureandLonglivedTangibleAssetImpairmentChargesNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#ClosureandLonglivedTangibleAssetImpairmentChargesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/ClosureandLonglivedTangibleAssetImpairmentChargesNarrativeDetails" xlink:type="extended" id="i3e9fad80ebe44189a7c2994396062cf9_ClosureandLonglivedTangibleAssetImpairmentChargesNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_186e26c1-899e-478d-bb7d-dc5a8272df9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_RestructuringCharges_186e26c1-899e-478d-bb7d-dc5a8272df9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessExitCosts1_c9ed9512-1b40-493d-b12c-af5062182f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessExitCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_BusinessExitCosts1_c9ed9512-1b40-493d-b12c-af5062182f7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsRelatedToClosureCharges_69b70564-442b-4cb2-8d98-576975cf9527" xlink:href="din-20211231.xsd#din_NumberOfRestaurantsRelatedToClosureCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_din_NumberOfRestaurantsRelatedToClosureCharges_69b70564-442b-4cb2-8d98-576975cf9527" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAccrualAdjustment1_2f19cad4-7827-4f9e-985f-38b2d618486c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserveAccrualAdjustment1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_RestructuringReserveAccrualAdjustment1_2f19cad4-7827-4f9e-985f-38b2d618486c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsRelatedToPriorPeriodClosureChargeRevisions_3e8fa4ab-a747-45d3-b831-d3b24af5eed9" xlink:href="din-20211231.xsd#din_NumberOfRestaurantsRelatedToPriorPeriodClosureChargeRevisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_din_NumberOfRestaurantsRelatedToPriorPeriodClosureChargeRevisions_3e8fa4ab-a747-45d3-b831-d3b24af5eed9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsSubjectToClosureCharges_8f87033b-fa99-4171-9377-f6eaa51367ee" xlink:href="din-20211231.xsd#din_NumberOfRestaurantsSubjectToClosureCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_din_NumberOfRestaurantsSubjectToClosureCharges_8f87033b-fa99-4171-9377-f6eaa51367ee" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b54e1764-570e-4821-9c8d-508c5a786816" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b54e1764-570e-4821-9c8d-508c5a786816" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_NumberOfRestaurantsSubjectToAssetImpairment_8849698d-fd05-4d8b-bd88-f5d743ea4b3a" xlink:href="din-20211231.xsd#din_NumberOfRestaurantsSubjectToAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_din_NumberOfRestaurantsSubjectToAssetImpairment_8849698d-fd05-4d8b-bd88-f5d743ea4b3a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseImpairmentLoss_173ad4ec-d245-4dca-9755-7fb3cab4d49d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_OperatingLeaseImpairmentLoss_173ad4ec-d245-4dca-9755-7fb3cab4d49d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf_559b0b7e-d8f7-4d81-a464-32c68045ad35" xlink:href="din-20211231.xsd#din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_din_ImpairmentPerAssetOfLongLivedAssetsToBeDisposedOf_559b0b7e-d8f7-4d81-a464-32c68045ad35" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7742a925-7a2e-4ddb-89f8-2348f6a24506" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ce5bd92e-07b4-4378-a874-6100aac8b3d9" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:to="loc_dei_LegalEntityAxis_ce5bd92e-07b4-4378-a874-6100aac8b3d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ce5bd92e-07b4-4378-a874-6100aac8b3d9_default" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ce5bd92e-07b4-4378-a874-6100aac8b3d9" xlink:to="loc_dei_EntityDomain_ce5bd92e-07b4-4378-a874-6100aac8b3d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e98474a0-9725-484d-9cd3-fa318143d408" xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ce5bd92e-07b4-4378-a874-6100aac8b3d9" xlink:to="loc_dei_EntityDomain_e98474a0-9725-484d-9cd3-fa318143d408" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IHOPAndApplebeesMember_286b4f04-b616-4a5e-8471-9a110e736706" xlink:href="din-20211231.xsd#din_IHOPAndApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e98474a0-9725-484d-9cd3-fa318143d408" xlink:to="loc_din_IHOPAndApplebeesMember_286b4f04-b616-4a5e-8471-9a110e736706" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_IhopMember_fb31c0cf-3610-4d92-ac4b-94fe733026e5" xlink:href="din-20211231.xsd#din_IhopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_IHOPAndApplebeesMember_286b4f04-b616-4a5e-8471-9a110e736706" xlink:to="loc_din_IhopMember_fb31c0cf-3610-4d92-ac4b-94fe733026e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ApplebeesMember_8de2ec3e-bd77-48fb-b4e1-48ef81d1018e" xlink:href="din-20211231.xsd#din_ApplebeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_IHOPAndApplebeesMember_286b4f04-b616-4a5e-8471-9a110e736706" xlink:to="loc_din_ApplebeesMember_8de2ec3e-bd77-48fb-b4e1-48ef81d1018e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureAxis_c384684c-0e4b-4ab8-a23c-79471de7ddf7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:to="loc_us-gaap_FranchisorDisclosureAxis_c384684c-0e4b-4ab8-a23c-79471de7ddf7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_c384684c-0e4b-4ab8-a23c-79471de7ddf7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_c384684c-0e4b-4ab8-a23c-79471de7ddf7" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_c384684c-0e4b-4ab8-a23c-79471de7ddf7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorDisclosureDomain_2b487db7-91f1-492f-b3ec-e81eb79cb704" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorDisclosureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FranchisorDisclosureAxis_c384684c-0e4b-4ab8-a23c-79471de7ddf7" xlink:to="loc_us-gaap_FranchisorDisclosureDomain_2b487db7-91f1-492f-b3ec-e81eb79cb704" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityOperatedUnitsMember_ebe385c4-3b23-47e5-9891-c8188105a954" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EntityOperatedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_2b487db7-91f1-492f-b3ec-e81eb79cb704" xlink:to="loc_us-gaap_EntityOperatedUnitsMember_ebe385c4-3b23-47e5-9891-c8188105a954" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisedUnitsMember_fd0fbd1a-31ee-4d89-895c-c4c0c3287916" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisedUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FranchisorDisclosureDomain_2b487db7-91f1-492f-b3ec-e81eb79cb704" xlink:to="loc_us-gaap_FranchisedUnitsMember_fd0fbd1a-31ee-4d89-895c-c4c0c3287916" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a20abae2-abc8-4417-8665-fcd48ccab491" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a20abae2-abc8-4417-8665-fcd48ccab491" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a20abae2-abc8-4417-8665-fcd48ccab491_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a20abae2-abc8-4417-8665-fcd48ccab491" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_a20abae2-abc8-4417-8665-fcd48ccab491_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_544fe160-a489-46a8-8f08-7fbc72aac36e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_a20abae2-abc8-4417-8665-fcd48ccab491" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_544fe160-a489-46a8-8f08-7fbc72aac36e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember_fbedf4a6-fe70-4379-b7fa-dd5527bf28a9" xlink:href="din-20211231.xsd#din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_544fe160-a489-46a8-8f08-7fbc72aac36e" xlink:to="loc_din_LandBuildingLeaseholdImprovementsAndFinanceLeasesMember_fbedf4a6-fe70-4379-b7fa-dd5527bf28a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_6b7a0999-6924-4d1f-aa80-79e011369b67" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_65147d8a-aa6e-4e87-932a-b86f16e2f578" xlink:to="loc_srt_RangeAxis_6b7a0999-6924-4d1f-aa80-79e011369b67" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_6b7a0999-6924-4d1f-aa80-79e011369b67_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_6b7a0999-6924-4d1f-aa80-79e011369b67" xlink:to="loc_srt_RangeMember_6b7a0999-6924-4d1f-aa80-79e011369b67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_db5d9b97-b53d-49aa-b8c5-3e8fd54d0802" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_6b7a0999-6924-4d1f-aa80-79e011369b67" xlink:to="loc_srt_RangeMember_db5d9b97-b53d-49aa-b8c5-3e8fd54d0802" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_88ec09e0-13bd-49d1-b563-f7dc5f56d588" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_db5d9b97-b53d-49aa-b8c5-3e8fd54d0802" xlink:to="loc_srt_MaximumMember_88ec09e0-13bd-49d1-b563-f7dc5f56d588" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_11ef0d49-8ef3-4b4e-a4e7-474b464713e7" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_db5d9b97-b53d-49aa-b8c5-3e8fd54d0802" xlink:to="loc_srt_MinimumMember_11ef0d49-8ef3-4b4e-a4e7-474b464713e7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansNarrativeDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockBasedIncentivePlansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansNarrativeDetails" xlink:type="extended" id="i8893480f08564681aceeb89671424c5d_StockBasedIncentivePlansNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_0adfde0d-cb38-4a49-9ed1-d0171151c738" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_0adfde0d-cb38-4a49-9ed1-d0171151c738" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b2162655-cbb7-40a8-90a6-7a33e4501010" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_b2162655-cbb7-40a8-90a6-7a33e4501010" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5746616d-e87d-45ad-b432-c80819824c16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5746616d-e87d-45ad-b432-c80819824c16" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_53472054-8b0e-4274-b9cf-3a2b6060ae05" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_53472054-8b0e-4274-b9cf-3a2b6060ae05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_69bafb26-5227-4d90-aea1-5897ef22f535" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_69bafb26-5227-4d90-aea1-5897ef22f535" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod_1aa181c8-0e74-4014-bff1-6525009e7142" xlink:href="din-20211231.xsd#din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_din_UnrecognizedCompensationCostRelatedToOptionsExpectedRecognitionPeriod_1aa181c8-0e74-4014-bff1-6525009e7142" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_4cee3538-ecc8-403a-9f6f-4ad280be81c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_4cee3538-ecc8-403a-9f6f-4ad280be81c3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_df0e35e3-9638-4a0c-bf74-98ce1a43acab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_df0e35e3-9638-4a0c-bf74-98ce1a43acab" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_9eb213a8-4de4-45b4-89ea-3ffdb41de97e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxExpenseFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_9eb213a8-4de4-45b4-89ea-3ffdb41de97e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_8a87bc18-5792-4975-a03f-2e20fcfd8b80" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_8a87bc18-5792-4975-a03f-2e20fcfd8b80" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock_9862f340-5f4a-4df4-b12a-eb1c559b9b39" xlink:href="din-20211231.xsd#din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_din_ShareBasedCompensationMultiplierForTargetAwardBasedOnTotalShareholderReturnOnCommonStock_9862f340-5f4a-4df4-b12a-eb1c559b9b39" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d394ac65-4fa5-447f-99ee-e6d5371ca1aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d394ac65-4fa5-447f-99ee-e6d5371ca1aa" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f71e3a56-5235-4508-ba1b-059d3cc0a775" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_01a64221-bd6e-491c-8995-e0b8faf0cd82" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:to="loc_us-gaap_PlanNameAxis_01a64221-bd6e-491c-8995-e0b8faf0cd82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_01a64221-bd6e-491c-8995-e0b8faf0cd82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_01a64221-bd6e-491c-8995-e0b8faf0cd82" xlink:to="loc_us-gaap_PlanNameDomain_01a64221-bd6e-491c-8995-e0b8faf0cd82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_7110a2a9-68ea-44c8-9c1b-a5201c1b2684" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_01a64221-bd6e-491c-8995-e0b8faf0cd82" xlink:to="loc_us-gaap_PlanNameDomain_7110a2a9-68ea-44c8-9c1b-a5201c1b2684" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_TwoThousandNineteenStockIncentivePlanMember_61ffa482-6986-443a-afcd-2d50db92a2ac" xlink:href="din-20211231.xsd#din_TwoThousandNineteenStockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_7110a2a9-68ea-44c8-9c1b-a5201c1b2684" xlink:to="loc_din_TwoThousandNineteenStockIncentivePlanMember_61ffa482-6986-443a-afcd-2d50db92a2ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DineEquityInc.2016StockIncentivePlanMember_2b811110-d9fa-4256-b91d-734ad6ca4b04" xlink:href="din-20211231.xsd#din_DineEquityInc.2016StockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_7110a2a9-68ea-44c8-9c1b-a5201c1b2684" xlink:to="loc_din_DineEquityInc.2016StockIncentivePlanMember_2b811110-d9fa-4256-b91d-734ad6ca4b04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DineequityInc2011StockIncentivePlanMember_453f7c04-aeb2-4e8e-aabd-497de580c5e9" xlink:href="din-20211231.xsd#din_DineequityInc2011StockIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_7110a2a9-68ea-44c8-9c1b-a5201c1b2684" xlink:to="loc_din_DineequityInc2011StockIncentivePlanMember_453f7c04-aeb2-4e8e-aabd-497de580c5e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_dac595c1-f68c-46de-8f66-d219f734a386" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:to="loc_srt_TitleOfIndividualAxis_dac595c1-f68c-46de-8f66-d219f734a386" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_dac595c1-f68c-46de-8f66-d219f734a386_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_dac595c1-f68c-46de-8f66-d219f734a386" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_dac595c1-f68c-46de-8f66-d219f734a386_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_ba6f4beb-2563-45d4-a8e5-e4eb02988c33" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_dac595c1-f68c-46de-8f66-d219f734a386" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_ba6f4beb-2563-45d4-a8e5-e4eb02988c33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_OfficersDirectorsandEmployeesMember_213c1c68-a3ee-4502-97b6-2577b9bbb712" xlink:href="din-20211231.xsd#din_OfficersDirectorsandEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_ba6f4beb-2563-45d4-a8e5-e4eb02988c33" xlink:to="loc_din_OfficersDirectorsandEmployeesMember_213c1c68-a3ee-4502-97b6-2577b9bbb712" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:to="loc_us-gaap_AwardTypeAxis_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_6d72398a-5cf0-4a0a-9b99-7717b9fba5e2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_4223b75a-0cde-4c23-97c8-1ed141e91ab8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:to="loc_us-gaap_EmployeeStockOptionMember_4223b75a-0cde-4c23-97c8-1ed141e91ab8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestrictedStockandRestrictedStockUnitsMember_9712e00a-d1f2-494e-a8e3-da40eefb589c" xlink:href="din-20211231.xsd#din_RestrictedStockandRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:to="loc_din_RestrictedStockandRestrictedStockUnitsMember_9712e00a-d1f2-494e-a8e3-da40eefb589c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CashsettledRestrictedStockUnitsMember_167d55fd-3084-466e-8c5a-c0fd0e7094dd" xlink:href="din-20211231.xsd#din_CashsettledRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:to="loc_din_CashsettledRestrictedStockUnitsMember_167d55fd-3084-466e-8c5a-c0fd0e7094dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_LongTermIncentivePlanMember_7e931270-9943-4576-9637-540a5064f943" xlink:href="din-20211231.xsd#din_LongTermIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0d9e2b11-38ad-4e18-9303-c691397957ba" xlink:to="loc_din_LongTermIncentivePlanMember_7e931270-9943-4576-9637-540a5064f943" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_663fa8c8-4636-412d-8a06-f0623a0e97d2" xlink:to="loc_srt_RangeAxis_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d" xlink:to="loc_srt_RangeMember_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5ca993ee-6013-4d5c-85a1-b1a1245a1a5a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_e2f93e7b-0833-4d47-9e8e-a4dae0d3ea6d" xlink:to="loc_srt_RangeMember_5ca993ee-6013-4d5c-85a1-b1a1245a1a5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_e5a26279-7657-4ea2-af80-5f8b95e1160f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5ca993ee-6013-4d5c-85a1-b1a1245a1a5a" xlink:to="loc_srt_MinimumMember_e5a26279-7657-4ea2-af80-5f8b95e1160f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_66d76243-25f6-49a8-a982-9e8fc02bcdba" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_5ca993ee-6013-4d5c-85a1-b1a1245a1a5a" xlink:to="loc_srt_MaximumMember_66d76243-25f6-49a8-a982-9e8fc02bcdba" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails" xlink:type="extended" id="i9488a09846604c759938ae7cd7efa787_StockBasedIncentivePlansEquityClassifiedAwardsStockOptionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_e55ee5ae-f0d4-4077-b697-311fb37e4a19" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_e55ee5ae-f0d4-4077-b697-311fb37e4a19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_56d213a4-9228-4b11-8a3a-6ca9097c89b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_56d213a4-9228-4b11-8a3a-6ca9097c89b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1a7e5891-ca44-41c9-b85b-a93aa8e7b058" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1a7e5891-ca44-41c9-b85b-a93aa8e7b058" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_a3ffc1d8-ff91-4be3-9d0c-dc3519be69c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_a3ffc1d8-ff91-4be3-9d0c-dc3519be69c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_aad21035-5db8-493f-a3d6-69bd802eb4f5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_aad21035-5db8-493f-a3d6-69bd802eb4f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e71bcec0-d607-45d7-bca9-7c4877cebb86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_838403ba-f91d-454d-b70c-5167e47a16b0" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e71bcec0-d607-45d7-bca9-7c4877cebb86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_4e31b2cf-723d-4d3b-82d3-615a400902f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e71bcec0-d607-45d7-bca9-7c4877cebb86" xlink:to="loc_us-gaap_AwardTypeAxis_4e31b2cf-723d-4d3b-82d3-615a400902f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e31b2cf-723d-4d3b-82d3-615a400902f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_4e31b2cf-723d-4d3b-82d3-615a400902f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_4e31b2cf-723d-4d3b-82d3-615a400902f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d59eaee-a550-4db6-aebc-2c29d8d3348c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_4e31b2cf-723d-4d3b-82d3-615a400902f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d59eaee-a550-4db6-aebc-2c29d8d3348c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_8a9d4576-601c-4ec9-a4ec-2c470d75b8a4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d59eaee-a550-4db6-aebc-2c29d8d3348c" xlink:to="loc_us-gaap_EmployeeStockOptionMember_8a9d4576-601c-4ec9-a4ec-2c470d75b8a4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails" xlink:type="extended" id="iae219e1074aa4257abb42cd94b975f4f_StockBasedIncentivePlansDisclosureofRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4b057c46-4c8e-46db-982e-e3e71c64d1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4b057c46-4c8e-46db-982e-e3e71c64d1b4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8ae21e0f-685a-4e3d-81c6-29f93ecdd7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_8ae21e0f-685a-4e3d-81c6-29f93ecdd7e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a15a46e8-a18d-4ed5-8d84-1a6177046c70" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_a15a46e8-a18d-4ed5-8d84-1a6177046c70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f3240792-445f-4b25-8cc6-9bf47732eeb2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f3240792-445f-4b25-8cc6-9bf47732eeb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b8133143-ed9a-493b-9ffa-a61ba5f3f1a2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_706af26b-54ed-44f2-99b2-b581e4262ad9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b8133143-ed9a-493b-9ffa-a61ba5f3f1a2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_82a3ffc9-e960-4ba3-aaf6-e0720ae0c50a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4b057c46-4c8e-46db-982e-e3e71c64d1b4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a9d98a26-ce32-4475-a56c-621127e020a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_a9d98a26-ce32-4475-a56c-621127e020a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_51aa241f-546d-423f-bac3-20631e77eff1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_51aa241f-546d-423f-bac3-20631e77eff1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8015c9d8-e0c8-4a97-a833-6142952753cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8015c9d8-e0c8-4a97-a833-6142952753cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_61a47a8b-205d-4ddc-a7e8-89a55af3dcbc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_f40cb421-4171-4258-8a90-4c0e4c1750d4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_61a47a8b-205d-4ddc-a7e8-89a55af3dcbc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_48b9281d-af26-4b2a-8c06-3ce3857dd305" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6f0aabc9-829f-4757-888a-701fa52a7ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4b057c46-4c8e-46db-982e-e3e71c64d1b4" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6f0aabc9-829f-4757-888a-701fa52a7ff0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6f0aabc9-829f-4757-888a-701fa52a7ff0" xlink:to="loc_us-gaap_AwardTypeAxis_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca289e0-3051-4b63-81d9-6132aaefe211" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2115cc5f-f4d8-4346-ab2d-aaa3b4b9159a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca289e0-3051-4b63-81d9-6132aaefe211" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_64cb5e14-d4e2-4f65-9c8f-ee2b7bf72c81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca289e0-3051-4b63-81d9-6132aaefe211" xlink:to="loc_us-gaap_RestrictedStockMember_64cb5e14-d4e2-4f65-9c8f-ee2b7bf72c81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_7cdaf623-ec1d-4e0f-b2db-5f48b88ee532" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8ca289e0-3051-4b63-81d9-6132aaefe211" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_7cdaf623-ec1d-4e0f-b2db-5f48b88ee532" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails" xlink:type="extended" id="i1d53277993374d45aacc122abc4970c6_StockBasedIncentivePlansLiabilityClassifiedAwardsCashsettledRestrictedStockUnitsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_cfaeff8b-7cb9-4fbf-9bb7-c362b56f5d44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_cfaeff8b-7cb9-4fbf-9bb7-c362b56f5d44" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c910e0e1-7f4c-4c94-ab89-7ed404e3c30c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_c910e0e1-7f4c-4c94-ab89-7ed404e3c30c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2c8f4b59-5632-45d9-bf86-9f726f92dc66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_2c8f4b59-5632-45d9-bf86-9f726f92dc66" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ae83f099-41bb-4e80-8953-2e26f0b0bb2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_ae83f099-41bb-4e80-8953-2e26f0b0bb2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2eda669c-2581-4451-bddb-7c3b83d12cf9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_60257f67-e236-4d7e-947d-70cbf689363b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2eda669c-2581-4451-bddb-7c3b83d12cf9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4bf980a2-f5e4-4ff3-a8bf-9df6e4ce8eb9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5b4c001d-6ccc-499b-a06d-67984d7bb739" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_cfaeff8b-7cb9-4fbf-9bb7-c362b56f5d44" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5b4c001d-6ccc-499b-a06d-67984d7bb739" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5b4c001d-6ccc-499b-a06d-67984d7bb739" xlink:to="loc_us-gaap_AwardTypeAxis_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0a589781-8b16-484a-a14b-7171ec0069cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_f27bd0b6-fe03-4280-bbdf-c5c8e8ac8197" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0a589781-8b16-484a-a14b-7171ec0069cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CashsettledRestrictedStockUnitsMember_91cbf5c8-fcfd-467e-b8f1-e18c76e28f7b" xlink:href="din-20211231.xsd#din_CashsettledRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0a589781-8b16-484a-a14b-7171ec0069cc" xlink:to="loc_din_CashsettledRestrictedStockUnitsMember_91cbf5c8-fcfd-467e-b8f1-e18c76e28f7b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/EmployeeBenefitPlansDetails" xlink:type="simple" xlink:href="din-20211231.xsd#EmployeeBenefitPlansDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/EmployeeBenefitPlansDetails" xlink:type="extended" id="i500bc529f70d4d14a8ff862b37f1e633_EmployeeBenefitPlansDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_0f78f035-cdff-4963-b6bd-f0cb9a933553" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_2401f659-f757-4722-bedb-aede6ef9e2cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_0f78f035-cdff-4963-b6bd-f0cb9a933553" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_2401f659-f757-4722-bedb-aede6ef9e2cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_EmployeesEligibleCompensationDeferralPercent_c186f870-7756-4792-ae1f-914f4167b5f4" xlink:href="din-20211231.xsd#din_EmployeesEligibleCompensationDeferralPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_0f78f035-cdff-4963-b6bd-f0cb9a933553" xlink:to="loc_din_EmployeesEligibleCompensationDeferralPercent_c186f870-7756-4792-ae1f-914f4167b5f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_e3952910-ec58-41ab-97fa-9e3073741e62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_0f78f035-cdff-4963-b6bd-f0cb9a933553" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_e3952910-ec58-41ab-97fa-9e3073741e62" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanTable_65075bf4-2b35-42ff-a3cb-ddccef00a771" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_0f78f035-cdff-4963-b6bd-f0cb9a933553" xlink:to="loc_us-gaap_DefinedContributionPlanTable_65075bf4-2b35-42ff-a3cb-ddccef00a771" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_3bb029cf-6896-4cf5-bf11-68ee149e549f" xlink:href="din-20211231.xsd#din_DefinedContributionPensionAndOtherPostretirementPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_65075bf4-2b35-42ff-a3cb-ddccef00a771" xlink:to="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_3bb029cf-6896-4cf5-bf11-68ee149e549f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionPlanDomain_3bb029cf-6896-4cf5-bf11-68ee149e549f_default" xlink:href="din-20211231.xsd#din_DefinedContributionPensionPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_3bb029cf-6896-4cf5-bf11-68ee149e549f" xlink:to="loc_din_DefinedContributionPensionPlanDomain_3bb029cf-6896-4cf5-bf11-68ee149e549f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_DefinedContributionPensionPlanDomain_9ade6823-7ed6-45c3-a397-611114acadf1" xlink:href="din-20211231.xsd#din_DefinedContributionPensionPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_din_DefinedContributionPensionAndOtherPostretirementPlansAxis_3bb029cf-6896-4cf5-bf11-68ee149e549f" xlink:to="loc_din_DefinedContributionPensionPlanDomain_9ade6823-7ed6-45c3-a397-611114acadf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FirstTierOfEmployeesEligibleCompensationDeferralMember_3184369a-528c-49da-94f7-6c6109983c81" xlink:href="din-20211231.xsd#din_FirstTierOfEmployeesEligibleCompensationDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_DefinedContributionPensionPlanDomain_9ade6823-7ed6-45c3-a397-611114acadf1" xlink:to="loc_din_FirstTierOfEmployeesEligibleCompensationDeferralMember_3184369a-528c-49da-94f7-6c6109983c81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_SecondTierOfEmployeesEligibleCompensationDeferralMember_4cd5bf9b-8584-4692-ba2d-183588f61312" xlink:href="din-20211231.xsd#din_SecondTierOfEmployeesEligibleCompensationDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_din_DefinedContributionPensionPlanDomain_9ade6823-7ed6-45c3-a397-611114acadf1" xlink:to="loc_din_SecondTierOfEmployeesEligibleCompensationDeferralMember_4cd5bf9b-8584-4692-ba2d-183588f61312" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/SegmentReportingDetails" xlink:type="simple" xlink:href="din-20211231.xsd#SegmentReportingDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SegmentReportingDetails" xlink:type="extended" id="i5807a175e9444bc6b9652a8314d65bfa_SegmentReportingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f23fcb4a-cbf7-4a3b-8c7b-70a62544fd62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f23fcb4a-cbf7-4a3b-8c7b-70a62544fd62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalIncome_3af1c567-c203-4db1-94bc-155abacbd78d" xlink:href="din-20211231.xsd#din_RentalIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_din_RentalIncome_3af1c567-c203-4db1-94bc-155abacbd78d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_de00b325-6a47-4709-9b03-737e31745f98" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_Revenues_de00b325-6a47-4709-9b03-737e31745f98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_efc89835-01af-4998-9f4a-55b3956a1b65" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_efc89835-01af-4998-9f4a-55b3956a1b65" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_6e019a7a-199f-47fb-9f08-e830595375be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_InterestExpense_6e019a7a-199f-47fb-9f08-e830595375be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_fc19e52a-ea9e-45f0-bea7-ac4224e537f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_fc19e52a-ea9e-45f0-bea7-ac4224e537f3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment_a9507f01-4146-441b-be62-29805e8898c8" xlink:href="din-20211231.xsd#din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_din_RestructuringSettlementandImpairmentProvisionsAndGoodwillandIntangibleAssetImpairment_a9507f01-4146-441b-be62-29805e8898c8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_23458898-9e8f-4e53-b471-c7274136937f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_23458898-9e8f-4e53-b471-c7274136937f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_3cd0b189-a338-454e-992f-a1b14c33cfee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_Goodwill_3cd0b189-a338-454e-992f-a1b14c33cfee" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9c1db4aa-1e04-4264-ad19-ad48880454c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_Assets_9c1db4aa-1e04-4264-ad19-ad48880454c6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_fc99a38a-5988-4e1d-a6f6-e2ad231c317c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1681fee5-36f3-4676-a73c-b87f9c506ead" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_fc99a38a-5988-4e1d-a6f6-e2ad231c317c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_10a9faad-f35b-4f33-b63f-9d1cc5d80afc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_fc99a38a-5988-4e1d-a6f6-e2ad231c317c" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_10a9faad-f35b-4f33-b63f-9d1cc5d80afc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_10a9faad-f35b-4f33-b63f-9d1cc5d80afc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_10a9faad-f35b-4f33-b63f-9d1cc5d80afc" xlink:to="loc_us-gaap_SegmentDomain_10a9faad-f35b-4f33-b63f-9d1cc5d80afc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_10a9faad-f35b-4f33-b63f-9d1cc5d80afc" xlink:to="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FranchiseOperationsMember_57795c7e-4b93-4e16-8a07-4fb3141975c7" xlink:href="din-20211231.xsd#din_FranchiseOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:to="loc_din_FranchiseOperationsMember_57795c7e-4b93-4e16-8a07-4fb3141975c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_RentalOperationsMember_e19079e0-cb30-496b-b482-d80bd42d8c4b" xlink:href="din-20211231.xsd#din_RentalOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:to="loc_din_RentalOperationsMember_e19079e0-cb30-496b-b482-d80bd42d8c4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_CompanyRestaurantsMember_df3ad081-96d6-4b6a-8f87-910fe634a285" xlink:href="din-20211231.xsd#din_CompanyRestaurantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:to="loc_din_CompanyRestaurantsMember_df3ad081-96d6-4b6a-8f87-910fe634a285" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinancingOperationsMember_f66309e2-2241-4100-8a63-2c4fbc51d7ef" xlink:href="din-20211231.xsd#din_FinancingOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_fb00a1ba-fbca-4616-b66a-8fe73f6227bc" xlink:to="loc_din_FinancingOperationsMember_f66309e2-2241-4100-8a63-2c4fbc51d7ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_dc033269-4c3a-4039-acd5-7e77a25becd6" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_fc99a38a-5988-4e1d-a6f6-e2ad231c317c" xlink:to="loc_srt_ProductOrServiceAxis_dc033269-4c3a-4039-acd5-7e77a25becd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_dc033269-4c3a-4039-acd5-7e77a25becd6_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_dc033269-4c3a-4039-acd5-7e77a25becd6" xlink:to="loc_srt_ProductsAndServicesDomain_dc033269-4c3a-4039-acd5-7e77a25becd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_21174732-6b83-4634-aa7e-f5ec9844a8c4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_dc033269-4c3a-4039-acd5-7e77a25becd6" xlink:to="loc_srt_ProductsAndServicesDomain_21174732-6b83-4634-aa7e-f5ec9844a8c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchisorMember_f70b7b4a-c741-4275-89a9-e619078832b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FranchisorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_21174732-6b83-4634-aa7e-f5ec9844a8c4" xlink:to="loc_us-gaap_FranchisorMember_f70b7b4a-c741-4275-89a9-e619078832b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FoodAndBeverageMember_fb655094-636e-4c9c-957f-4d95ed4668f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FoodAndBeverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_21174732-6b83-4634-aa7e-f5ec9844a8c4" xlink:to="loc_us-gaap_FoodAndBeverageMember_fb655094-636e-4c9c-957f-4d95ed4668f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServiceMember_c0b18081-5e72-4d10-a0ca-9c0c208c22cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialServiceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_21174732-6b83-4634-aa7e-f5ec9844a8c4" xlink:to="loc_us-gaap_FinancialServiceMember_c0b18081-5e72-4d10-a0ca-9c0c208c22cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2a4673c7-931f-440a-8f47-608dff00af3f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_fc99a38a-5988-4e1d-a6f6-e2ad231c317c" xlink:to="loc_srt_ConsolidationItemsAxis_2a4673c7-931f-440a-8f47-608dff00af3f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2a4673c7-931f-440a-8f47-608dff00af3f_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2a4673c7-931f-440a-8f47-608dff00af3f" xlink:to="loc_srt_ConsolidationItemsDomain_2a4673c7-931f-440a-8f47-608dff00af3f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_945ec740-8cb3-4b49-b6dc-a873676a1f14" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2a4673c7-931f-440a-8f47-608dff00af3f" xlink:to="loc_srt_ConsolidationItemsDomain_945ec740-8cb3-4b49-b6dc-a873676a1f14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_035f1469-d412-4131-bfc8-799ef9efc3e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_945ec740-8cb3-4b49-b6dc-a873676a1f14" xlink:to="loc_us-gaap_OperatingSegmentsMember_035f1469-d412-4131-bfc8-799ef9efc3e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_a2b100ee-582b-4ff8-8139-35d1dec67210" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_945ec740-8cb3-4b49-b6dc-a873676a1f14" xlink:to="loc_us-gaap_CorporateNonSegmentMember_a2b100ee-582b-4ff8-8139-35d1dec67210" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dineequity.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="din-20211231.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://www.dineequity.com/role/SubsequentEventsDetails" xlink:type="extended" id="i0a78211e07ba4e35a4d9f68c8af03fed_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_3fd52272-f95b-453f-98c2-4a13ceb4abaa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_4d82e080-b4b3-4efe-9664-116925e9eee6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_3fd52272-f95b-453f-98c2-4a13ceb4abaa" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_4d82e080-b4b3-4efe-9664-116925e9eee6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_ffa31e8e-2fb8-4446-b483-49994b747006" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_3fd52272-f95b-453f-98c2-4a13ceb4abaa" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_ffa31e8e-2fb8-4446-b483-49994b747006" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_30d387e0-242c-42cd-a571-9303ca595d74" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_3fd52272-f95b-453f-98c2-4a13ceb4abaa" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_30d387e0-242c-42cd-a571-9303ca595d74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_281d9139-5995-4900-8f4e-19d984d04081" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_3fd52272-f95b-453f-98c2-4a13ceb4abaa" xlink:to="loc_us-gaap_SubsequentEventTable_281d9139-5995-4900-8f4e-19d984d04081" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_679d1955-bfa3-4322-8583-679cbc99f030" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_281d9139-5995-4900-8f4e-19d984d04081" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_679d1955-bfa3-4322-8583-679cbc99f030" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_679d1955-bfa3-4322-8583-679cbc99f030_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_679d1955-bfa3-4322-8583-679cbc99f030" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_679d1955-bfa3-4322-8583-679cbc99f030_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_a557587a-b7e8-4e5d-ba1b-4b43af55bea7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_679d1955-bfa3-4322-8583-679cbc99f030" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_a557587a-b7e8-4e5d-ba1b-4b43af55bea7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_92f4c307-7b22-47dc-964d-f8d7d2c00154" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_a557587a-b7e8-4e5d-ba1b-4b43af55bea7" xlink:to="loc_us-gaap_SubsequentEventMember_92f4c307-7b22-47dc-964d-f8d7d2c00154" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_4ad15d35-deef-43c1-8f27-c9ef5320ec1c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_281d9139-5995-4900-8f4e-19d984d04081" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_4ad15d35-deef-43c1-8f27-c9ef5320ec1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_4ad15d35-deef-43c1-8f27-c9ef5320ec1c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_4ad15d35-deef-43c1-8f27-c9ef5320ec1c" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_4ad15d35-deef-43c1-8f27-c9ef5320ec1c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_ef347486-c33e-4d8a-bfef-f1012f5d9938" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_4ad15d35-deef-43c1-8f27-c9ef5320ec1c" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_ef347486-c33e-4d8a-bfef-f1012f5d9938" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_A2022RepurchaseProgramMember_711040f0-e80a-4de8-b66a-890e86bf0c6c" xlink:href="din-20211231.xsd#din_A2022RepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_ef347486-c33e-4d8a-bfef-f1012f5d9938" xlink:to="loc_din_A2022RepurchaseProgramMember_711040f0-e80a-4de8-b66a-890e86bf0c6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_A2019ShareRepurchaseProgramMember_ef9c16f3-3bb5-41af-90d2-a5c2d142c66d" xlink:href="din-20211231.xsd#din_A2019ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_ef347486-c33e-4d8a-bfef-f1012f5d9938" xlink:to="loc_din_A2019ShareRepurchaseProgramMember_ef9c16f3-3bb5-41af-90d2-a5c2d142c66d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_din_FinanceLeaseandFinancingObligationsCurrent_657b8ad6-38f6-4191-9f76-ebab23ac567a" xlink:href="din-20211231.xsd#din_FinanceLeaseandFinancingObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_din_FinanceLeaseandFinancingObligationsCurrent_657b8ad6-38f6-4191-9f76-ebab23ac567a" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
