Other forms: blackjacks
Blackjack is a card game in which players try to reach twenty-one without going over. Play blackjack, a hand of blackjack, the blackjack table.
You play against the dealer rather than the other players, and going over twenty-one loses at once whatever the dealer holds. The name comes from a bonus once paid for an ace with a black jack.
1nounblackjackA card game where players aim for twenty-one.
“He learnt blackjack in a week and lost his wages in a night.”
blackjack is a game.
From black + jack.
Etymology from Wiktionary, CC BY-SA