blackjack

noun

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
2
a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
3
a piece of metal covered by leather with a flexible handle; used for hitting people
4
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

Also useful for “blackjack”:Scrabble— High-value letters — see what it scores