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
Definition categories: plant
2. a piece of metal covered by leather with a flexible handle; used for hitting people
Definition categories: man–made, bludgeon
3. a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
Definition categories: man–made, 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