WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
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
Word Usage
"It here means the art of moving in coition, which is especially affected, even by modest women, throughout the East and they have many books teaching the genial art."