underage

adjective

un·​der·​age ˌən-dər-ˈāj 

1

: of less than mature or legal age

2

: done by or involving underage persons

underage drinking

Examples of underage in a Sentence

They were not allowed into the club because they were underage.

Recent Examples on the Web

While both Twain and her older sister Jill were already adults, their three younger siblings, including sister Carrie-Ann and brothers Mark and Darry, were underage and needed a legal guardian. — Ashley Hume, FOXNews.com, 21 July 2026

For this reason, studies that measure whether a kid has access to any platform, whether an underage user is using an account or not, will greatly underestimate the law’s effects. — Ravi Iyer, Time, 18 July 2026

Documents said that same day, someone from the foster home told the original Pembroke Pines Police Department investigating officer Goldbourne was planning to come back and meet with another underage girl. — Kairi Lowery, Miami Herald, 15 July 2026

But those restrictions have been criticized for being too easy to get around and the EU's digital regulators accused Instagram's parent Meta Platforms earlier this year of failing to keep underage users of the site. — ABC News, 13 July 2026

Word History

First Known Use

1561, in the meaning defined at sense 1

Kids Definition

underage

adjective

un·​der·​age ˌən-də-ˈrāj 

: of less than mature or legal age