adult Definition

adult
adj

1. Fully grown; mature.

Thesaurus: grown-up, mature, of age, developed, ripened; Antonym: immature.
2. Typical of, or suitable for, a fully grown person.
3. Said especially of films: containing sexually explicit or indecent scenes, and therefore regarded as unsuitable for children.

noun

1. A fully grown person, animal, bird or plant.

Thesaurus: grown-up, woman, man.

Derivative: adulthood
noun

Etymology: 16c: from Latin adultus grown-up, from adolescere to grow up; compare adolescent.