Copulation is a word for sex: specifically, the penis going into the vagina kind of sex.

Copulation is an even more scientific way of saying "sexual intercourse." You can use this word to describe the sexual practices of both humans and animals. Zoologists need to make sure there is copulation among endangered animals such as pandas. Stray animals like cats engage in a lot of copulation, which is why there are so many cats. If your female dog is not fixed and copulates at the park, you might have puppies on the way soon.

Definitions of copulation

n the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur

carnal knowledge, coition, coitus, congress, intercourse, relation, sex act, sexual congress, sexual intercourse, sexual relation
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the act of depriving a woman of her virginity (especially by rupturing the hymen through sexual intercourse)
ass, nookie, nooky, piece of ass, piece of tail, roll in the hay, screw, screwing, shag, shtup
slang for sexual intercourse
hank panky
illicit sexual intercourse
the act (by a man) of inserting his penis into the vagina of a woman
criminal congress, unlawful carnal knowledge
forbidden or tabu sexual intercourse between individuals
extramarital sex, free love
sexual intercourse between individuals who are not married to one another
sexual intercourse between persons too closely related to marry (as between a parent and a child)
Type of:
sex, sex activity, sexual activity, sexual practice
activities associated with sexual intercourse

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