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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.

"It's been my entire adult life," said Destiny YouTuber Datto in an emotional video update after the news was released.

From BBC • May 22, 2026

In part, this archetype, as Fiedler dubs it, reflects our literature’s recurrent failure to deal honestly with adult heterosexual love and its attendant responsibilities.

From The Wall Street Journal • May 22, 2026

Among all the amino acids tested, cysteine produced the strongest regenerative effect on both stem cells and progenitor cells, which eventually mature into adult intestinal cells.

From Science Daily • May 21, 2026

We have two adult children — one is self-sufficient, and the other may need lifelong support due to health issues.

From MarketWatch • May 21, 2026

Betsie cut three slices from the round loaf of bread while I looked around the table trying to decide which adult would be most enthusiastic about my decision to stay at home.

From "The Hiding Place" by Corrie ten Boom




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