1. 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
   "Vingt-et-un is the French name for the game commonly known as blackjack";
   - twenty-one, vingt-et-un, pontoon [Brit]
    
2. [N. Amer] A piece of metal covered by leather with a flexible handle; used for hitting people
   "The thug threatened him with a blackjack";
   - cosh [Brit, informal], sap [N. Amer, informal]
    
3. 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
   "Blackjack oak covered the dry, sandy hillsides";
   - blackjack oak, jack oak, Quercus marilandica

1. Exert pressure on someone through threats
   "The mob blackjacked the shopkeeper into paying for 'protection'";
   - blackmail, pressure

Derived forms: blackjacking, blackjacked, blackjacks

Type of: act upon, bludgeon, card game, cards, influence, scrub oak, work

Encyclopedia: Blackjack, Texas