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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a16965-ef62-7634-be1b-57243f77bc43,g:96a417f5-dd8f-4cdb-bc3e-4f102d444566-->
<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.drhorton.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="dhi-20261022.xsd#DocumentandEntityInformationDocument"/>
  <link:definitionLink xlink:role="http://www.drhorton.com/role/DocumentandEntityInformationDocument" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_01a16965-ef62-7ba0-8316-71af9a141a9f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntitiesTable_01a16965-ef62-7ba0-8316-71af9a141a9f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a16965-ef62-7c73-af34-042115b481a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_01a16965-ef62-7ba0-8316-71af9a141a9f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a16965-ef62-7c73-af34-042115b481a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-7c73-af34-042115b481a9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a16965-ef62-7c73-af34-042115b481a9" xlink:to="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-7c73-af34-042115b481a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-773f-baae-774550229d5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_01a16965-ef62-7c73-af34-042115b481a9" xlink:to="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-773f-baae-774550229d5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_01a16965-ef62-76cb-880d-2701c02ca01d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-773f-baae-774550229d5d" xlink:to="loc_us-gaap_SeniorNotesMember_01a16965-ef62-76cb-880d-2701c02ca01d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_01a16965-ef62-7d49-a437-e08e01489793" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a16965-ef62-773f-baae-774550229d5d" xlink:to="loc_us-gaap_CommonStockMember_01a16965-ef62-7d49-a437-e08e01489793" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsExchangeAxis_01a16965-ef62-76d1-bbff-0852b5072957" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityListingsExchangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_01a16965-ef62-7ba0-8316-71af9a141a9f" xlink:to="loc_dei_EntityListingsExchangeAxis_01a16965-ef62-76d1-bbff-0852b5072957" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_01a16965-ef62-76d1-bbff-0852b5072957_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_ExchangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityListingsExchangeAxis_01a16965-ef62-76d1-bbff-0852b5072957" xlink:to="loc_dei_ExchangeDomain_01a16965-ef62-76d1-bbff-0852b5072957_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_01a16965-ef62-735c-a4b1-e84a66dc7311" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_ExchangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityListingsExchangeAxis_01a16965-ef62-76d1-bbff-0852b5072957" xlink:to="loc_dei_ExchangeDomain_01a16965-ef62-735c-a4b1-e84a66dc7311" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_exch_XNYS_01a16965-ef62-73b0-b544-a7f4c0b26f1a" xlink:href="https://xbrl.sec.gov/exch/2026/exch-2026.xsd#exch_XNYS"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_ExchangeDomain_01a16965-ef62-735c-a4b1-e84a66dc7311" xlink:to="loc_exch_XNYS_01a16965-ef62-73b0-b544-a7f4c0b26f1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_exch_XCHI_01a16965-ef62-7d64-b412-17e3ed8513f5" xlink:href="https://xbrl.sec.gov/exch/2026/exch-2026.xsd#exch_XCHI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_ExchangeDomain_01a16965-ef62-735c-a4b1-e84a66dc7311" xlink:to="loc_exch_XCHI_01a16965-ef62-7d64-b412-17e3ed8513f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_01a16965-ef62-7df2-adce-d2856a9c8a83" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_DocumentType_01a16965-ef62-7df2-adce-d2856a9c8a83" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_01a16965-ef62-7107-a019-cf8b0362adf6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_DocumentPeriodEndDate_01a16965-ef62-7107-a019-cf8b0362adf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_01a16965-ef62-71de-b53d-ab91096a4155" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityRegistrantName_01a16965-ef62-71de-b53d-ab91096a4155" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_01a16965-ef62-7037-94a2-bc841651ce00" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityIncorporationStateCountryCode_01a16965-ef62-7037-94a2-bc841651ce00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_01a16965-ef62-78fd-9a96-4b386b93462a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityFileNumber_01a16965-ef62-78fd-9a96-4b386b93462a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_01a16965-ef62-7007-925d-92ed827cc862" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityTaxIdentificationNumber_01a16965-ef62-7007-925d-92ed827cc862" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_01a16965-ef62-73a5-96c1-7ba83f63dce4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityAddressAddressLine1_01a16965-ef62-73a5-96c1-7ba83f63dce4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_01a16965-ef62-76e8-a946-508f305cf03a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityAddressCityOrTown_01a16965-ef62-76e8-a946-508f305cf03a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_01a16965-ef62-70c4-b4e4-7a02de6ecc9e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityAddressStateOrProvince_01a16965-ef62-70c4-b4e4-7a02de6ecc9e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_01a16965-ef62-78fe-94e6-0c595ace4659" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityAddressPostalZipCode_01a16965-ef62-78fe-94e6-0c595ace4659" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_01a16965-ef62-79d9-a933-cd15a6f3dcb5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_CityAreaCode_01a16965-ef62-79d9-a933-cd15a6f3dcb5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_01a16965-ef62-74f5-907b-0ee54c2c43f4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_LocalPhoneNumber_01a16965-ef62-74f5-907b-0ee54c2c43f4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_01a16965-ef62-7971-819c-3fb13b105b72" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_WrittenCommunications_01a16965-ef62-7971-819c-3fb13b105b72" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_01a16965-ef62-7765-9303-850153666ecb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_SolicitingMaterial_01a16965-ef62-7765-9303-850153666ecb" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_01a16965-ef62-762f-9e57-e47c90f8a1cc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_PreCommencementTenderOffer_01a16965-ef62-762f-9e57-e47c90f8a1cc" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_01a16965-ef62-7682-84de-878686277bb0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_01a16965-ef62-7682-84de-878686277bb0" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_01a16965-ef62-70d8-b567-afef0aae72b2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_Security12bTitle_01a16965-ef62-70d8-b567-afef0aae72b2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_01a16965-ef62-7501-a095-331b26d36b7f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_TradingSymbol_01a16965-ef62-7501-a095-331b26d36b7f" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_01a16965-ef62-775b-892f-9ad10448a076" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_SecurityExchangeName_01a16965-ef62-775b-892f-9ad10448a076" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_01a16965-ef62-7fca-968e-6529cdefd864" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityEmergingGrowthCompany_01a16965-ef62-7fca-968e-6529cdefd864" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_01a16965-ef62-751b-b136-d4d102de2f43" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_AmendmentFlag_01a16965-ef62-751b-b136-d4d102de2f43" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_01a16965-ef62-76c0-932a-7c8fb9196a45" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_01a16965-ef62-7d61-8e40-ed69a163ac57" xlink:to="loc_dei_EntityCentralIndexKey_01a16965-ef62-76c0-932a-7c8fb9196a45" xlink:type="arc" order="21"/>
  </link:definitionLink>
</link:linkbase>
