Adult

a.	1.	Having arrived at maturity, or to full size and strength; matured; as, an adult person or plant; an adult ape; an adult age.
n.	1.	A person, animal, or plant grown to full size and strength; one who has reached maturity.

Noun	1.	adult - a fully developed person from maturity onward Synonyms: grownup Antonyms: juvenile, juvenile person - a youthful person
	2.	adult - any mature animal
Adj.	1.	adult - (of animals) fully developed; "an adult animal"; "a grown woman" Synonyms: full-grown, fully grown, grown, grownup, big

ADULT, in the civil law. An infant who, if a boy, has attained his full age of fourteen years, and if a girl, her full age of twelve. Domat, Liv. Prel. t. 2, s. 2, n. 8. In the common law an adult is considered one of full age. 1 Swanst. R. 553.

aged, big, full-blown, full-fledged, grown, grown up, grown-up, marriable, marriageable, mature, matured, maturescent, nubile, of age, of marriageable age, old, ripe, ripened