1. blackjack oak, blackjack, jack oak, Quercus marilandica, scrub oak

usage: 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

2. blackjack, cosh, sap, bludgeon

usage: a piece of metal covered by leather with a flexible handle; used for hitting people

3. black flag, pirate flag, Jolly Roger, blackjack, flag

usage: a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship

4. blackjack, twenty-one, vingt-et-un, card game, cards

usage: 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


1. blackmail, blackjack, pressure, influence, act upon, work

usage: exert pressure on someone through threats

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See also: blackjack (Dictionary)