underage

/ˌʌndərˈeɪdʒ/
adjective
  1. Below the legal age of adulthood, typically for drinking, voting, or other activities.
    • She was caught buying alcohol while underage.
    • The club does not allow underage customers inside.
    • Underage drivers must have a licensed adult in the car.
Antonyms
noun
  1. A person who is below the legal age of adulthood.
    • The party was shut down because underages were present.
    • The store was fined for selling cigarettes to underages.
    • The law protects underages from exploitation.
What does "underage" mean? | whatsthatwordmean | whatsthatwordmean