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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.

Researchers found the odds of adult koalas being admitted into care or dying in the Australian state of New South Wales rose when average maximum temperatures over a seven-day period reached 27C.

From Barron's • May 26, 2026

“Pop,” my adult daughter remarked a few years ago.

From The Wall Street Journal • May 26, 2026

Aging parents can bring out the worst in adult children, who vie for control of their parents’ attention, their love and their finances.

From MarketWatch • May 25, 2026

Because of his size, finding teenage opponents proved impossible, forcing him to wait until he was 16 to enter the adult ranks.

From BBC • May 22, 2026

Otherwise, he was a big, strong adult bear—as majestic as he was scary.

From "Two Degrees" by Alan Gratz




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