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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.

Prosecutor Michael Robertson asked Belov: "You were the adult in this situation, you could have just walked away couldn't you?"

From BBC • Jun. 11, 2026

Coyotes and other canids serve as the primary hosts for adult tapeworms.

From Science Daily • Jun. 11, 2026

Social media services, including adult content platforms, would also face new requirements under the law to "mitigate risks associated with exposure" to various categories of harmful content and apply labels to synthetically generated content.

From Barron's • Jun. 10, 2026

Some beneficiaries, such as adult children, may not realize they have to empty an inherited IRA in 10 years from the date of death.

From MarketWatch • Jun. 10, 2026

“You were always clinging. Onto your mother, onto whichever adult was caring for the littles that season. Dahlia and I joked that your chosen name should be Ivy, because of how tightly you clung.”

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




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