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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.

Single older adults without adult children are particularly at risk.

From MarketWatch • Apr. 14, 2026

Traditional custodial accounts are available at most brokerages and let an adult, usually a parent, manage an account on behalf of a child of any age.

From The Wall Street Journal • Apr. 14, 2026

The average adult produces more than a liter of urine and over 100 grams of poo each day.

From Science Daily • Apr. 13, 2026

Young adult adaptations are at the core of the platform’s broader efforts to champion diversity in storytelling, said Peter Friedlander, Prime Video’s head of global TV.

From Los Angeles Times • Apr. 13, 2026

Nathan tried his best to ignore the fact that Devin was an adult and also a human.

From "Healer of the Water Monster" by Brian Young




Vocabulary lists containing adult