U18

noun

A person who is under 18 years of age.

“a U18 sports team”

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Meanings

adjectiveU18 (not comparable)
  1. abbreviationinitialismnot comparableInitialism of under 18 (years of age).

    a U18 sports team

nounU18 (plural U18s)

plural U18s

  1. A person who is under 18 years of age.

    There is a separate competition for U18s.

Cite this entry
APA

U18. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/U18

MLA

“U18.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/U18. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “U18,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/U18.

Source: U18 on Wiktionary, CC BY-SA 4.0.