blackjack meaning and definition

BLACKJACK noun

Definition of blackjack (noun)

1. a common scrubby deciduous tree of central and southeastern United States having dark bark and broad three-lobed (club-shaped) leaves; tends to form dense thickets
   • synonyms: blackjack oak, jack oak, Quercus marilandica
2. a piece of metal covered by leather with a flexible handle; used for hitting people
   • synonyms: cosh, sap
3. a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
   • synonyms: black flag, Jolly Roger, pirate flag
4. 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: twenty-one, vingt-et-un

BLACKJACK verb

Definition of blackjack (verb)

1. exert pressure on someone through threats
   • synonyms: blackmail, pressure