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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.

When he joined the government last year, Feinberg committed to transfer his Cerberus holdings to trusts that benefit his adult children.

From The Wall Street Journal • Apr. 16, 2026

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

Three measles deaths were reported nationally last year — two among unvaccinated school-age children in Texas and one in an unvaccinated adult in New Mexico.

From Los Angeles Times • Apr. 16, 2026

And if ever I needed an adult to like me, it’s now.

From "The Tenth Mistake of Hank Hooperman" by Gennifer Choldenko




Vocabulary lists containing adult