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nounsexual intercourse between persons too closely related to marry (as between a parent and a child)
Definition that contains incest
- incestuous resembling incest as by excessive intimacy
- incestuous relating to or involving incest
- incestuously by incest
- morning-after pill a large dose of estrogen taken orally within 24 to 72 hours after intercourse; prevents implantation of a fertilized ovum and so acts as a contraceptive; commonly used after rape or incest