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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.

He also has two adult offspring: Daughter Bo is from a previous relationship with Amanda Rushing; he shares son Spencir, 27, with his first wife.

From Los Angeles Times • Apr. 3, 2026

At the same time, the therapy also produced meaningful improvements in adult patients.

From Science Daily • Apr. 3, 2026

"The teenagers said they had been pressured by the adult," another source close to the case added.

From Barron's • Apr. 1, 2026

Paul Dix, a UK-based teacher, expert in inclusive behaviour support and director of support organisation When The Adults Change, said "consistent adult behaviour" was "the absolute foundation of great education".

From BBC • Mar. 30, 2026

Thirty minutes later, they walked into the adult detention center and stood in front of the receptionist.

From "Healer of the Water Monster" by Brian Young