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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.

“I think this was supposed to be their first foray into quote-unquote young adult programming,” said Michel Ghanem, who writes about television.

From Los Angeles Times • Apr. 9, 2026

The severity of Emma’s teenage plan is analyzed against the kind person she’s proven herself to be as an adult.

From Salon • Apr. 9, 2026

"This sense of teamwork is something that you don't usually get, like, as an adult," Koch added.

From Barron's • Apr. 9, 2026

The analysis revealed previously unknown patterns of connectivity, including direct links between cell types that had not been known to connect in the adult brain.

From Science Daily • Apr. 7, 2026

“After yesterday, I think you should have an adult with you.”

From "Caterpillar Summer" by Gillian McDunn