sex in WordNet English dictionary

1. stimulate sexually
   "This movie usually arouses the male audience"
   arouse  sex  excite  turn on  wind up 
   
2. tell the sex (of young chickens)
   sex 
   

1. the properties that distinguish organisms on the basis of their reproductive roles
   "she didn't want to know the sex of the foetus"
   sex  gender  sexuality 
   
2. activities associated with sexual intercourse
   "they had sex in the back seat"
   sexual activity  sexual practice  sex  sex activity 
   
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"
   sex  sexual urge 
   
4. either of the two categories (male or female) into which most organisms are divided
   "the war between the sexes"
   sex