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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.

The adult victim was not with the suspect at the time of the incident, officials said.

From Los Angeles Times • May 18, 2026

As an adult, he crisscrossed the Alaskan frontier, lived in Sweden, and visited the Norwegian island town of Longyearbyen, one of the world’s northernmost settlements.

From The Wall Street Journal • May 17, 2026

Scientists say the Riodeva fossil site continues to yield valuable material, including additional bones from the same adult dinosaur and rare juvenile remains.

From Science Daily • May 17, 2026

If you’re an older adult, you might want to weigh the fact that you could be more vulnerable to infection on a cruise.

From Slate • May 16, 2026

Ms. O’Malley introduced me to lots of other adult chicken people who arrived later as “Jim Brown’s grandniece, who inherited his chickens and his good poultry sense.”

From "Unusual Chickens for the Exceptional Poultry Farmer" by Kelly Jones




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