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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:c85514a8-62f3-4d22-850d-2b96d4a46309,g:e9a760f4-5fc1-4ffd-8ad2-6302caa64280-->
<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.sci-corp.com/role/DocumentandEntityInformationStatement" xlink:type="simple" xlink:href="sci-20210503.xsd#DocumentandEntityInformationStatement"/>
  <link:definitionLink xlink:role="http://www.sci-corp.com/role/DocumentandEntityInformationStatement" xlink:type="extended" id="iad06026ec93f4562b9fcf637e9abe0a3_DocumentandEntityInformationStatement">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_0b2b6d13-c38c-4cdc-8330-8e3951b19035" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_DocumentType_0b2b6d13-c38c-4cdc-8330-8e3951b19035" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_5d1b6c0c-903b-45d5-ac99-7a9db75f85c3" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_DocumentPeriodEndDate_5d1b6c0c-903b-45d5-ac99-7a9db75f85c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_a4b6fc0e-0e40-4f50-a3e8-26857dc8b9f4" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityRegistrantName_a4b6fc0e-0e40-4f50-a3e8-26857dc8b9f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_dbd3940b-db4c-4aca-a4a6-453b01058cbc" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityIncorporationStateCountryCode_dbd3940b-db4c-4aca-a4a6-453b01058cbc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_e6959d68-37bc-4430-8d27-72d846f1a4fd" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityFileNumber_e6959d68-37bc-4430-8d27-72d846f1a4fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_f5e86d60-e8d5-4e88-a5cf-26b3df5a6fd9" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityTaxIdentificationNumber_f5e86d60-e8d5-4e88-a5cf-26b3df5a6fd9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_c006cf23-51df-479f-a374-218433041047" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityAddressAddressLine1_c006cf23-51df-479f-a374-218433041047" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_1e78ae4e-22b2-4e5d-b55d-5253472df200" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityAddressCityOrTown_1e78ae4e-22b2-4e5d-b55d-5253472df200" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_0ae579cc-f081-4765-8f08-c713d3abf55d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityAddressStateOrProvince_0ae579cc-f081-4765-8f08-c713d3abf55d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_d45fafba-e17e-42f8-85cd-7c3c55f0429d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityAddressPostalZipCode_d45fafba-e17e-42f8-85cd-7c3c55f0429d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_b1ccf89a-fb10-4de8-8b56-199f7cda0c02" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_CityAreaCode_b1ccf89a-fb10-4de8-8b56-199f7cda0c02" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_d9217380-e043-4687-a58a-cd9c590de382" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_LocalPhoneNumber_d9217380-e043-4687-a58a-cd9c590de382" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_b2d03d04-4461-4a58-8cdc-194f63a225b4" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_WrittenCommunications_b2d03d04-4461-4a58-8cdc-194f63a225b4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_fe96da01-8d0a-4725-bfe2-56fa7aed106a" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_SolicitingMaterial_fe96da01-8d0a-4725-bfe2-56fa7aed106a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_708c2d5f-af52-4136-89f7-1b8ef38b8908" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_PreCommencementTenderOffer_708c2d5f-af52-4136-89f7-1b8ef38b8908" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_57647cc9-5c68-4b8a-8234-19a249e3af45" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_57647cc9-5c68-4b8a-8234-19a249e3af45" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_b76cb50f-1405-4f04-b685-24436183bf6c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityEmergingGrowthCompany_b76cb50f-1405-4f04-b685-24436183bf6c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_a099c913-db16-49e8-974f-87502549237e" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_Security12bTitle_a099c913-db16-49e8-974f-87502549237e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_2153c668-210f-4f8b-81d6-fb7e57bac69b" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_TradingSymbol_2153c668-210f-4f8b-81d6-fb7e57bac69b" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_68a970bf-7849-433a-8917-e505edb54aa8" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_SecurityExchangeName_68a970bf-7849-433a-8917-e505edb54aa8" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_479680f4-430d-425f-ad2d-4b4fba999ee9" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_EntityCentralIndexKey_479680f4-430d-425f-ad2d-4b4fba999ee9" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_13a2955c-b53d-4919-968a-fbdca9f88beb" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_AmendmentFlag_13a2955c-b53d-4919-968a-fbdca9f88beb" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_19075dce-1742-4b01-a956-91ba20ef5636" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_992a4ab9-10fb-4e82-8195-db626a666423" xlink:to="loc_dei_DocumentInformationTable_19075dce-1742-4b01-a956-91ba20ef5636" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationDocumentAxis_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentInformationDocumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_19075dce-1742-4b01-a956-91ba20ef5636" xlink:to="loc_dei_DocumentInformationDocumentAxis_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentDomain_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_DocumentInformationDocumentAxis_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64" xlink:to="loc_dei_DocumentDomain_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentDomain_fdb9821d-50d8-4e62-aebd-1c17ffb43db4" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_DocumentInformationDocumentAxis_a9700ae7-bfaa-4ce6-afff-53b7e0e05c64" xlink:to="loc_dei_DocumentDomain_fdb9821d-50d8-4e62-aebd-1c17ffb43db4" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
