Age Group
adult Audio
a·dult [ uh-duhlt, ad-uhlt ]
Definitions related to adult:
  • A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • An age group comprised of humans who have reached reproductive age.
    NCI
    U.S. National Cancer Institute, 2021
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