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English definition of “incestuous”

incestuous

adjective     /ɪnˈses.tju.əs/
involving incest: The film is about Auteil's incestuous love for his sister.Relating to sex and sexual desireRude and cheeky disapproving involving only a close or limited group of people, who do not communicate or do business with people outside the group: Journalists and politicians often have a rather incestuous relationship.Groups of peopleNarrow-minded incestuously     /-li/ adverb Relating to sex and sexual desireRude and cheeky incestuousness     /-nəs/ noun [U] Sexual activity in generalPhysical and sexual assault and abduction
(Definition of incestuous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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