The noun sex has 4 senses (first 2 from tagged texts)
1. (14) sexual activity, sexual practice, sex, sex activity -- (activities associated with sexual intercourse; "they had sex in the back seat")
2. (7) sex -- (either of the two categories (male or female) into which most organisms are divided; "the war between the sexes")
3. sex, sexual urge -- (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")
4. sex, gender, sexuality -- (the properties that distinguish organisms on the basis of their reproductive roles; "she didn't want to know the sex of the foetus")
Overview of verb sex
The verb sex has 2 senses (no senses from tagged texts)
1. arouse, sex, excite, turn on, wind up -- (stimulate sexually; "This movie usually arouses the male audience")