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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.

And yet, a few Red Hot bangers manage to endlessly caravan in and out of lives because they’re in constant rotation on Jack FM and other adult contemporary radio stations: “Give It Away.”

From Salon • Apr. 4, 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 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

“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 didn’t look big enough for an adult person to live inside, but Danny was learning that there was more to things than could be seen with the naked eye.

From "The Way to Rio Luna" by Zoraida Cordova