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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.

Yes, really: This idea is the impetus for exploring, in the film, whether reducing plastics can help adult men conceive.

From Slate • Apr. 16, 2026

We are both in our early 50s, and we both have adult children.

From MarketWatch • Apr. 16, 2026

Orange County has reported a measles case in a young adult who potentially exposed people at a gym and urgent care center in Ladera Ranch, as well as a case in a toddler.

From Los Angeles Times • Apr. 16, 2026

Researchers analyzed registry data covering the entire adult population of Sweden to explore new ways of identifying melanoma risk.

From Science Daily • Apr. 15, 2026

Given my job now, why didn’t Frances Miranda Gonzagaga ever arrange to update my exterior shell to make me look like an adult?

From "The School for Whatnots" by Margaret Peterson Haddix




Vocabulary lists containing adult