Definition of incestuous
1 : constituting or involving incest
2 : guilty of incest
3 : excessively or improperly intimate or exclusive <mainstream fashion magazines have an incestuous relationship with advertisers — Guy Trebay>
Examples of incestuous in a sentence
There were rumors that the father and daughter had had an incestuous relationship.
First Known Use of incestuous
INCESTUOUS Defined for English Language Learners
Definition of incestuous for English Language Learners
: involving sexual intercourse between closely related people : involving incest
Seen and Heard
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