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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.

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

From Barron's • Apr. 1, 2026

The 68-year-old was looking after two adult dogs, eight puppies and a child while Warren, an amateur rapper, was filming a music video in London.

From BBC • Mar. 31, 2026

He notes that adult Uberabatitan individuals, unlike the younger specimen analyzed, likely faced the same challenges as other large sauropods when trying to stand upright.

From Science Daily • Mar. 30, 2026

“Each of the complainants was a highly educated adult with access to outside resources, social networks, and the unfettered ability to leave the community at any time,” wrote her lawyer, Jennifer Bonjean.

From The Wall Street Journal • Mar. 30, 2026

It wasn’t Momma Bear this time—it was a full-grown adult male.

From "Two Degrees" by Alan Gratz