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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.

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

“Active adult and move-up segments have outperformed relative to the entry-level, where affordability concerns remain intense,” he says.

From Barron's • Apr. 12, 2026

The mudbean house was mostly empty at this time of day, as adult witches were busy at work and younger witches were still at school.

From "Witchlings" by Claribel A. Ortega




Vocabulary lists containing adult