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WordReference Random House Learner's Dictionary of American English © 2024a•dult /əˈdʌlt, ˈædʌlt/USA pronunciation n. [countable]- Developmental Biologya person who is fully grown, developed, or of age:Only adults may purchase alcohol.
adj. [usually: before a noun] - Developmental Biologyhaving attained full size and strength;
mature:adult plants. - intended only for adults;
not suitable for children:adult movies. - of or like a fully grown, mature person:The teenager had a very adult expression on her face.
a•dult•hood, n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2024a•dult (ə dult′, ad′ult),USA pronunciation adj. - having attained full size and strength;
grown up;
mature:an adult person, animal, or plant. - of, pertaining to, or befitting adults.
- intended for adults;
not suitable for children:adult entertainment.
n. - a person who is fully grown or developed or of age.
- a full-grown animal or plant.
- Lawmakinga person who has attained the age of maturity as specified by law.
- Latin adultus grown (past participle of adolēre to make grow), equivalent. to ad- ad- + ul- (identical with base al- in aliment, ol- in prolific) + -tus past participle suffix
- 1525–35; 1925–30 for def. 3;
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