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adult is on the Academic Word List.
- IPA (key): /əˈdʌlt/ or /ˈædʌlt/
- (countable) An adult is a person who is of the legal age of majority.
- At age 18 years, he became an adult, so he could move out without his parents' consent.
- Adult usually means a person who is in a legal sense either age 18 years or older.
- An adult is a human who is sexually, physically and/or mentally mature.
- The Harry Potter series was read mostly by young adults.
- A person may be physically mature and a biological adult by age 16 or so.
- An adult is a sexually mature nonhuman animal.
- Adult female cows feed milk to their offspring.
