The SendDefinitionListTypeEnum object defines how Marketing Cloud Engagement acts upon a send definition list.

NameData TypeDescription
DomainExclusionEnumerationIndicates domains to be excluded from sends.
ExclusionListEnumerationIndicates the subscriber list used to exclude an audience from a particular send.
OptOutListEnumerationDefines audience that has opted out of receiving more sends; refers to a publication list.
SourceListEnumerationIndicates list used to send to audience. The source list corresponds to a subscriber list within an account.