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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.

See Examples For:

Illinois does not have filial responsibility laws, so adult children are not financially responsible for their parents.

From MarketWatch ● Oct. 22, 2026

His sharply angular features equally suit a man whose flesh has withered with age and a teenage boy and young adult with a slender, gawky frame.

From The Wall Street Journal ● Oct. 22, 2026

As an adult, it remains challenging to coordinate schedules and availability, not to mention alignment with other critical details like preferred arrival times and seating/standing location.

From Salon ● Oct. 21, 2026

“It’s something that is not exclusively for children, and audiences, adult audiences, are enjoying those films as well.”

From Los Angeles Times ● Oct. 21, 2026

They prowled around them, seemingly uninterested in the adult humans—their eyes were on Christopher and Mal.

From "Impossible Creatures" by Katherine Rundell

At a panel discussion at IT Symposium/Xpo Wednesday, Gartner’s Tina Nunno made clear who the adults in the room are when it comes to building enterprise resilience in the age of AI.

From The Wall Street Journal ● Oct. 22, 2026

Most participants were older, white Americans, meaning the findings may not accurately reflect the experiences of younger adults or more racially and ethnically diverse populations.

From Science Daily ● Oct. 21, 2026

The King has described the Aberfan disaster which killed 116 children and 28 adults as the "most tragic of days imaginable" on its 60th anniversary.

From BBC ● Oct. 21, 2026

Ultra-processed foods account for more than half of the calories consumed by American adults.

From Science Daily ● Oct. 21, 2026

I add “New York State” and “futurist sustainable living community,” because those are the words I’ve always heard the adults use to describe the Ranch.

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


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