GNU Collaborative International Dictionary of English

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Found 2 definitions

1.       
   Adult , a. [L. adultus, p. p. of adolescere, akin to alere to nourish: cf. F. adulte. See Adolescent, Old.] Having arrived at maturity, or to full size and strength; matured; as, an adult person or plant; an adult ape; an adult age.
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2.       
   Adult, n. A person, animal, or plant grown to full size and strength; one who has reached maturity.
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   ☞ In the common law, the term is applied to a person who has attained full age or legal majority; in the civil law, to males after the age of fourteen, and to females after twelve.
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