incest.
Sexual relations between close relatives, especially immediate family members and sometimes first cousins, usually considered taboo.
Meaning & usage
Sexual relations between close relatives, especially immediate family members and sometimes first cousins, usually considered taboo.
Genetic problems caused by incest are thought to have plagued many royal families in the Middle Ages.
Romantic relationships between close relatives, also widely taboo.
Where this word comes from
Learned borrowing from Latin incestus. Displaced Old English mǣġhǣmed (literally “relative-sex”). Doublet of inchaste.
To engage in incestuous sexual activities.
Where this word comes from
Learned borrowing from Latin incestus. Displaced Old English mǣġhǣmed (literally “relative-sex”). Doublet of inchaste.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.