• enPR: twĕn'tē wŭnʹ, IPA: /ˌtwɛntiˈwʌn/
  • (parts of the UK) IPA: /ˌtwɛntiˈwɒn/
  • (parts of the US and Canada) enPR: twŭn'tē wŭnʹ, IPA: /ˌtwʌntiˈwʌn/
  1. The cardinal number occurring after twenty and before twenty-two, represented in Roman numerals as XXI and in Arabic numerals as 21.
  • eleventeen (nonce word)
  • one and twenty
  • Arabic numerals: 21
  • Roman numerals: XXI
Translations Noun

twenty-one (uncountable)

  1. (card games) Blackjack.
    • 1978, Lawrence Durrell, Livia, Faber & Faber 1992 (Avignon Quintet), p. 398:
      They were to spend many an evening together sitting round the old kitchen table playing twentyone [...].
  2. (sports) A basketball-based game in which players attempt to score exactly twenty-one points.

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