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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.

Despite this, Lynn went on to gain a degree and a PHD - and is now an adult advisory board member at the Dyscalculia Network.

From BBC • Apr. 15, 2026

New college grads are starting their adult lives in a challenging environment.

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

Me as a kid and him as a teen, almost an adult.

From "The Wrong Way Home" by Kate O’Shaughnessy




Vocabulary lists containing adult