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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.

New York City churches, like St. Joseph’s and St. Patrick’s Old Cathedral, are experiencing a surge in young adult attendance.

From The Wall Street Journal • May 3, 2026

The unusual color change was first noticed when researchers found an adult female at the Smithsonian Tropical Research Institute's field station on Barro Colorado Island in Panama.

From Science Daily • May 2, 2026

After handling general felonies and misdemeanors in the adult criminal and juvenile courts, he was assigned in 2022 to the Mental Health Division.

From Los Angeles Times • May 1, 2026

The NHS is expanding the initiative to adult and child wards, with others settings including maternity, neonatal and emergency departments to follow.

From BBC • May 1, 2026

After your rite, you’re considered an adult, and you’re entrusted with a lot more responsibility.

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




Vocabulary lists containing adult