adult

(noun) a fully developed person from maturity onward. Synonyms: grownup.

(noun) any mature animal.

(adj) (of animals) fully developed. Synonyms: big, full-grown, fully grown, grown, grownup. Examples: "An adult animal." "A grown woman."

(adj) designed to arouse lust. Synonyms: pornographic. Examples: "Pornographic films and magazines." "Adult movies."