■ noun
1》 chiefly N. Amer. a gambling card game in which players try to acquire cards with a face value totalling 21 and no more.
2》 a weed related to the bur-marigold, with barbed black seeds. [ Bidens pilosa .]
3》 N. Amer. a flexible lead-filled truncheon.
4》 historical a pirates' black flag.
5》 historical a tarred-leather container used for alcoholic drink.