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Definitions

adult

[uh-duhlt, ad-uhlt] / əˈdʌlt, ˈæd ʌlt /
ADJECTIVE
being mature, fully grown
Synonyms
Antonyms


NOUN
a mature, fully grown person
Synonyms
STRONGEST
STRONG
grownup
WEAK
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Every adult in the UK has a personal allowance of £12,570 on which they don't pay any income tax.

From BBC • Apr. 11, 2026

Unlike adult incontinence products, baby diapers are not regulated as medical devices under the Federal Drug Administration.

From Los Angeles Times • Apr. 10, 2026

Mari Adam, a certified financial planner and educator, has been trying to get her own adult children to bump up contributions from 6% to 9% — and having no luck.

From MarketWatch • Apr. 10, 2026

Sklar’s two adult children, appropriately enough, hate him, but it’s unclear whether he hated them first.

From The Wall Street Journal • Apr. 9, 2026

The adult standing next to the kid squeezed his shoulder and smiled proudly.

From "Boy 2.0" by Tracey Baptiste




Vocabulary lists containing adult