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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.

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

“But that’s not an adult way to handle it,” Harris said between errands in Monrovia’s quaint shopping district.

From Los Angeles Times • 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

In 1980, adult obesity rates in England were just 6% for men and 9% for women – less than a third of rates today, according to the UK Health Security Agency.

From BBC • May 16, 2026

Maya-Jade said in that scolding adult voice that had made the boy so angry when they first met.

From "Not Nothing" by Gayle Forman




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