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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.

At $30, adult admission to see the 44th president’s story is more than at any other U.S. presidential library, a Wall Street Journal review shows.

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

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

“Yeah, well, I don’t want it to be my responsibility! Why should it be on me? I still don’t have all my adult teeth!”

From "Impossible Creatures" by Katherine Rundell




Vocabulary lists containing adult