Definition of sexual intercourse noun from the Oxford Advanced Learner's Dictionary

 

sexual intercourse

 noun
noun
BrE
 
; NAmE
 
(also intercourse)(formal coitus)[uncountable](formal)
 
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the physical activity of sex, usually describing the act of a man putting his penis inside a woman’s vaginaExtra examples Rape is committed where sexual intercourse takes place without consent. She denied having had sexual intercourse with him. the crime of obtaining sexual intercourse by threat
See the Oxford Advanced American Dictionary entry: sexual intercourse