adj. & n.
--adj.
1. mature, grown-up.
2 a of or for adults (adult education). b euphem. sexually explicit; indecent (adult films).
--n.
1. an adult person.
2 Law a person who has reached the age of majority.
Derivatives:
adulthood n. adultly adv.
Etymology: L adultus past part. of adolescere grow up: cf. ADOLESCENT