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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.

Addiewell, the only privately run jail in Scotland, can hold just short of 800 prisoners and accommodates convicted adult male prisoners and men on remand.

From BBC • Apr. 15, 2026

Single older adults without adult children are particularly at risk.

From MarketWatch • Apr. 14, 2026

Pereira, who runs the financial tech company, says his longevity offers a glimpse to his own adult sons about what life can be like in their eighth decade.

From The Wall Street Journal • Apr. 13, 2026

The average adult produces more than a liter of urine and over 100 grams of poo each day.

From Science Daily • Apr. 13, 2026

“After yesterday, I think you should have an adult with you.”

From "Caterpillar Summer" by Gillian McDunn




Vocabulary lists containing adult