From WordNet (r) 3.0 (2006):
sex
n 1: activities associated with sexual intercourse; "they had
sex in the back seat" [syn: sexual activity, sexual
practice, sex, sex activity]
2: either of the two categories (male or female) into which most
organisms are divided; "the war between the sexes"
3: all of the feelings resulting from the urge to gratify sexual
impulses; "he wanted a better sex life"; "the film contained
no sex or violence" [syn: sex, sexual urge]
4: the properties that distinguish organisms on the basis of
their reproductive roles; "she didn't want to know the sex of
the foetus" [syn: sex, gender, sexuality]
v 1: stimulate sexually; "This movie usually arouses the male
audience" [syn: arouse, sex, excite, turn on, wind
up]
2: tell the sex (of young chickens)