sex
1. sex \'seks\ n [ME, fr. L sexus] 1: either of two divisions of organisms distinguished respectively as male or female 2: the sum of the structural, functional, and behavioral peculiarities of l iving beings that subserve reproduction by two interacting parents and distinguish males and females 3a: sexually motivated phenomena or behavior 3b: SEXUAL INTERCOURSE 2. sex vt 1: to identify the sex of {~ chicks} 2a: to increase the sexual appeal of 2b: to arouse the sexual desires of