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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.

We asked a group of economists and personal finance authors about financially supporting adult children—including their own.

From The Wall Street Journal • May 30, 2026

The set by Marsha Ginsberg presents a model of Cranberry, with its downtown buildings miniaturized in the style of an adult playhouse.

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

William Ward runs an adult reading group through Dungannon Library and said there was a "certain degree of angst that the library was going to be closed for regular activities".

From BBC • May 28, 2026

Even a silly, cross, and not entirely truthful adult like Lady Constance Ashton?

From "The Unseen Guest" by Maryrose Wood




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