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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.

My adult children received a legacy from a relative they loved, and the overall taxes will be lower.

From The Wall Street Journal • Apr. 3, 2026

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

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

From Barron's • Apr. 1, 2026

They found him not guilty in relation to the second adult dog, Beauty, on the basis that she was owned by his girlfriend.

From BBC • Mar. 31, 2026

Lizzie was six or seven, and for weeks she ordered every adult she saw to bend down so she could search their head for hidden writing.

From "The Bletchley Riddle" by Ruta Sepetys and Steve Sheinkin