Wiktionary
vb. To engage in sexual intercourse or any other sexual act.
WordNet
v. have sexual intercourse with; "This student sleeps with everyone in her dorm"; "Adam knew Eve"; "Were you ever intimate with this man?" [syn: roll in the hay, love, make out, make love, sleep with, get laid, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, eff, hump, lie with, bed, have a go at it, bang, get it on, bonk]
Usage examples of "have sex".
We do not have sex, Christian thought at me as he turned the taps on full force, then examined a couple of bottles of bath scents and oils.
I've always wanted to have sex with the first guy I had a Hope-like conversation/connection with.
They all want to do his bidding, to be near him, to have sex with him.