Adult Definition

ə-dŭlt, ădŭlt
adults
noun
adults
A man or woman who is fully mature; grown-up.
Webster's New World
An animal or plant that is fully developed.
Webster's New World
A person who has reached the age of majority, now generally 18 years.
Webster's New World
One who has attained maturity or legal age.
American Heritage Medicine
A fully grown, mature organism.
American Heritage Medicine
Synonyms:
Antonyms:
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adjective
Mature in age, size, strength, etc.; grown-up.
Webster's New World
Of or for adult persons.
An adult novel.
Webster's New World
Containing or dealing in explicitly sexual material; pornographic.
Adult movies.
American Heritage
Containing or providing sexually explicit or, esp., pornographic material.
Adult movies.
Webster's New World
Fully developed and mature.
American Heritage Medicine
Antonyms:
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Other Word Forms of Adult

Noun

Singular:
adult
Plural:
adults

Origin of Adult

  • French adulte, Latin adultus (“grown up”), perfect passive participle of adolescō (“I grow up”). Compare adolescent.

    From Wiktionary

  • From Latin adultus past participle of adolēscere to grow up adolescent

    From American Heritage Dictionary of the English Language, 5th Edition

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