(intransitive, informal) To behave like an adult. / (nonstandard, rare) To (cause to) be or become an adult.

A fully grown human or animal. / A person who has reached the legal age of majority.

Fully grown. / Intended for or restricted to adults rather than children. / Containing material of an explicit sexual nature; of, or pertaining to, pornography. / Vulgar or profane.

To commit adultery. / To pollute something; to adulterate.

An adulterer, especially a male one.

(rare) Completely grown; mature.

simple past tense and past participle of adult

simple past tense and past participle of adultize

(transitive, sociology, psychology) To raise (a child) in such a way that it adopts adult behaviors earlier than is usual.

present participle of adultize