from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Sexual union between a male and a female involving insertion of the penis into the vagina.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The act of sexual procreation between a man and a woman, requiring insertion of the penis into the vagina and culminating in ejaculation of semen.
from The Century Dictionary and Cyclopedia
- n. Coition; sexual intercourse; copulation.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- 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
Latin, from past participle of coīre, to copulate : co-, co- + īre, to go, come; see ei- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin coitus. (Wiktionary)