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Synonyms

underage

1 American  
[uhn-der-eyj] / ˌʌn dərˈeɪdʒ /

adjective

  1. lacking the required age, especially that of legal maturity.

underage 2 American  
[uhn-der-ij] / ˈʌn dər ɪdʒ /

noun

  1. shortage; deficiency in amount.

underage British  
/ ˌʌndərˈeɪdʒ /

adjective

  1. below the required or standard age, esp below the legal age for voting or drinking

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of underage1

First recorded in 1585–95; under- + age

Origin of underage2

First recorded in 1605–15; under- + -age

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Those who do not confirm how old they are or are underage will have web content filters turned on automatically.

From BBC • Mar. 25, 2026

Meta's chief executive Mark Zuckerberg took the stand during the trial, pushing back against accusations that his company had done too little to keep underage users off his platform and had profited from their usage.

From Barron's • Mar. 14, 2026

TikTok said it used "enhanced technologies" to help detect and remove underage accounts.

From BBC • Mar. 11, 2026

Sworn Testimony: Mark Zuckerberg faced pointed questions about his company’s underage users and content moderation efforts at a landmark Los Angeles trial Wednesday.

From The Wall Street Journal • Feb. 22, 2026

She then blew a note on her pitch pipe, and the children, like so many underage weight-lifters, raised their hymnbooks.

From "Nine Stories" by J. D. Salinger

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.