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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

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

Traditional custodial accounts are available at most brokerages and let an adult, usually a parent, manage an account on behalf of a child of any age.

From The Wall Street Journal • Apr. 14, 2026

With some ordinary dull adult voice droning on, so the greatest danger is that I might fall asleep.

From "Found" by Margaret Peterson Haddix




Vocabulary lists containing adult