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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.

With so much spending on healthcare, older boomers—and their adult kids—expect better results and a less confusing, complicated and fragmented system.

From The Wall Street Journal • 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

Every adult in the UK has a personal allowance of £12,570 on which they don't pay any income tax.

From BBC • Apr. 11, 2026

Mari Adam, a certified financial planner and educator, has been trying to get her own adult children to bump up contributions from 6% to 9% — and having no luck.

From MarketWatch • Apr. 10, 2026

“Let’s chalk today up to rookie error. Tomorrow morning you’ll be at work at ten and you’ll stay until six, unless one of the staff —the actual adult staff—tells you otherwise.”

From "Not Nothing" by Gayle Forman




Vocabulary lists containing adult