Pronunciation: (seks),[key] —n. 1. either the male or female division of a species, esp. as differentiated with reference to the reproductive functions.
2. the sum of the structural and functional differences by which the male and female are distinguished, or the phenomena or behavior dependent on these differences.
3. the instinct or attraction drawing one sex toward another, or its manifestation in life and conduct.
6. to have sex, to engage in sexual intercourse.
—v.t. 1. to ascertain the sex of, esp. of newly-hatched chicks.
2. sex up,Informal. a. to arouse sexually: The only intent of that show was to sex up the audience. b. to increase the appeal of; to make more interesting, attractive, or exciting: We've decided to sex up the movie with some battle scenes.