incest

The definition of incest is sex between close blood relatives.

(noun)

See incest in Webster's New World College Dictionary

noun

sexual intercourse between persons too closely related to marry legally
sexual molestation of a child or adolescent by a relative, esp. by a parent or other adult relative

Origin: ME < L incestum, moral sin, incest, neut. of incestus, unchaste < in-, not + castus, chaste: see caste

See incest in American Heritage Dictionary 4

noun

Sexual relations between persons who are so closely related that their marriage is illegal or forbidden by custom.
The statutory crime of sexual relations with such a near relative.

Origin:

Origin: Middle English

Origin: , from Latin incestum

Origin: , from

Origin: neuter of incestus, impure, unchaste

Origin: : in-, not; see in-¹

Origin: + castus, pure, chaste; see kes- in Indo-European roots

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