[ in-ses-choo-uh s ]
/ ɪnˈsɛs tʃu əs /


involving incest.
guilty of incest.
being so close or intimate as to prevent proper functioning: an incestuous relationship between organized crime and government.

Origin of incestuous

1525–35; < Late Latin incestuōsus, equivalent to Latin incestu- stem of incestus incest + -ōsus -ous

OTHER WORDS FROM incestuous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for incestuous

British Dictionary definitions for incestuous

/ (ɪnˈsɛstjʊəs) /


relating to or involving incestan incestuous union
guilty of incest
obsolete resulting from incestan incestuous bastard
resembling incest in excessive or claustrophobic intimacy

Derived forms of incestuous

incestuously, adverbincestuousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for incestuous

[ ĭn-sĕschōō-əs ]


Of, involving, or suggestive of incest.
Having committed incest.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.