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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.

It’s a growing demographic hitting both genders, driven in part by climbing divorce rates among older Americans and a rising number of adult children becoming alienated from their parents.

From The Wall Street Journal • May 31, 2026

It’s a thrill to watch this kind of original, adult moviemaking that’s all too rare these days, and Roher hits all the right notes.

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

An AI facial recognition tool that aims to detect adult migrants posing as children will be deployed at the UK's borders next year.

From BBC • May 28, 2026

We don’t have time to deal with some concerned adult who wants to know why we’re alone on the side of the highway.

From "The Manifestor Prophecy" by Angie Thomas




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