Definition of incest in English:

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Pronunciation: /ˈinˌsest/


1Sexual relations between people classed as being too closely related to marry each other.
Example sentences
  • We also show incest avoidance between closely related kin, as well as the influence of other factors on paternity in males.
  • The theme of incest and sexual abuse is, unfortunately, a common one throughout the book.
  • There are also scenes of fighting, murder, incest, oral sex and cross-dressing.
1.1The crime of having sexual intercourse with a parent, child, sibling, or grandchild.
Example sentences
  • Sexual crimes include all forms of adultery, incest, and forbidden intercourse with a Jewish woman.
  • At the moment, incest covers not simply sexual intercourse but any form of sexual connection.
  • As a result, rape in the home, with the exception of incest, is almost never punished.


Middle English: from Latin incestus, incestum 'unchastity, incest', from in- 'not' + castus 'chaste'.

For editors and proofreaders

Syllabification: in·cest

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