Meaning

• A category into which sexually-reproducing organisms are divided on the basis of their reproductive roles in their species.

  "The effect of the medication is dependent upon age, sex, and other factors."

• Another category, especially of humans and especially based on sexuality or gender roles.

• The members of such a category, taken collectively.

• The distinction and relation between these categories, especially in humans; gender.

• (with "the") Women; the human female sex and those who belong to it.

• Sexual activity, usually sexual intercourse unless preceded by a modifier.

• Genitalia: a penis or vagina.

Meaning

• To determine the sex of an animal.

• To have sex with.