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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.

The conversation about the intricacies of supporting adult children got surprisingly personal.

From The Wall Street Journal • May 29, 2026

The set by Marsha Ginsberg presents a model of Cranberry, with its downtown buildings miniaturized in the style of an adult playhouse.

From Los Angeles Times • May 29, 2026

The team compared young, adult, and old fish, examining many aspects of protein production inside brain cells.

From Science Daily • May 29, 2026

A report carried out by the UK government's independent immigration inspector last year found cases where adult migrants had been classified as children - and cases where child migrants had been wrongly classified as adults.

From BBC • May 28, 2026

I’m just a seventh grader, and everybody else here is an adult, thought Natalie.

From "Two Degrees" by Alan Gratz




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