: a card game the object of which is to be dealt cards having a higher count than those of the dealer up to but not exceeding 21. called also twenty-one, vingt-et-un.

Blackjack, also known as 21, is a popular casino card game in which players compare their hand of cards with that of the dealer. To win at Blackjack, a player must create a hand with a higher total than that of the dealer, but without exceeding 21. Make better decisions. Learn the rules of the game before you play.