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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 adult victim was not with the suspect at the time of the incident, officials said.

From Los Angeles Times • May 18, 2026

Scientists say the Riodeva fossil site continues to yield valuable material, including additional bones from the same adult dinosaur and rare juvenile remains.

From Science Daily • May 17, 2026

Mall owners resort to banning anyone under 18 unaccompanied by an adult, following waves of teen disruptions at their properties.

From The Wall Street Journal • May 16, 2026

In 1980, adult obesity rates in England were just 6% for men and 9% for women – less than a third of rates today, according to the UK Health Security Agency.

From BBC • May 16, 2026

Alexander and Beowulf were in their own house, after all, under the supervision of two adult gentlemen, one of whom was their legal guardian.

From "The Unseen Guest" by Maryrose Wood




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