(1)   Activities associated with sexual intercourse
"They had sex in the back seat"
(2)   The properties that distinguish organisms on the basis of their reproductive roles
"She didn't want to know the sex of the foetus"
(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"
(4)   Either of the two categories (male or female) into which most organisms are divided
"The war between the sexes"


(5)   Tell the sex (of young chickens)
(6)   Stimulate sexually
"This movie usually arouses the male audience"


1382, from < . Thought to be connected with , by the concept of division, or 'half' of the race. Akin to . Meaning "sexual intercourse" first attested 1929 (in writings of D.H. Lawrence).


  1. Either of two main divisions (either male or female) into which many organisms can be placed, according to reproductive function or organs; gender.
    What sex is that hamster?
    The abnormality is found in both sexes.
  2. The distinguishing property, quality, or assemblage of properties by which organisms are classified as female or male on the basis of their reproductive organs and functions; the set of properties by which male is distinguished from female.
    The effect of the medication is dependent upon age, sex, and other factors.
    The researchers divided the subjects by sex.
  3. Sexual intercourse; the act of sexual intercourse.
    All you ever think about is sex.
    We had sex in the back seat.
  4. Genitalia; a penis or vagina.
  5. the sex. Women; womankind. Also, the fair sex, the fairer sex, the whimsical sex.


gender, sexuality coitus, sexual intercourse; see WikiSaurus:sexual intercourse


  1. To determine the biological sex of an animal.
    It is not easy to sex lizards.
  2. To have sex with.
    The passionate lovers sexed each other every night.
    OK, so I'm sexin' her, right, and all I can think of is this other girl.