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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.

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

From Science Daily • Jun. 11, 2026

Though Anthony was 17 at the time of the murder on 2 April 2025, under Texas law he was able to be charged as an adult.

From BBC • Jun. 10, 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

For better or worse, a credit history opens a lot of doors in adult life.

From MarketWatch • Jun. 9, 2026

At a time in England when longbow archery was mandatory for all adult men, longbows, various forms of shorter bows, arrows, and other archery-related equipment were the most common weapons aboard the Mary Rose.

From "Shipwrecked!" by Martin W. Sandler




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