twenty-one

/ˌtwɛnti wən/

/twɛntiˈwʌn/

Definitions of twenty-one

1. noun

   the cardinal number that is the sum of twenty and one
   synonyms: 21, XXI

   type of:

   large integer

   an integer equal to or greater than ten
2. adjective

   being one more than twenty
   synonyms: 21, xxi

   cardinal

   being or denoting a numerical quantity but not order
3. noun

   a gambling game using cards; the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21
   synonyms: blackjack, vingt-et-un

   type of:

   card game, cards

   a game played with playing cards