blackjack definition | Dictionary.com

black⋅jack

[blak-jak]

–noun

1.	a short, leather-covered club, consisting of a heavy head on a flexible handle, used as a weapon.

Cards.

a.	twenty-one (def. 4).

b.	Also called natural. (in twenty-one) an ace together with a ten or a face card as the first two cards dealt.

c.	a variety of twenty-one in which any player can become dealer.

3.	black flag (defs. 1, 2).

4.	a small oak, Quercus marilandica, of the eastern U.S., having a nearly black bark and a wood of little value except for fuel.

5.	a large drinking cup or jug for beer, ale, etc., originally made of leather coated externally with tar. Compare bombard (def. 7).

6.	caramel or burnt sugar for coloring spirits, vinegar, coffee, etc.

7.	Mineralogy. a dark, iron-rich variety of sphalerite.

–verb (used with object)

8.	to strike or beat with a blackjack.

9.	to compel by threat.

Origin:
1505–15; black + jack ¹

–noun

1.	a pirate flag, usually of black cloth with a white skull and crossbones on it; Jolly Roger.

2.	a flag having two yellow and two black squares, signifying the letter L in the International Code of Signals: formerly so called when used by itself to indicate the presence of cholera on board a vessel.

3.	a signal given to an automobile racing driver to stop, usually because the car may have a dangerous problem that requires inspection.

Also called blackjack (for defs. 1, 2).

Origin:
1585–95

[pur-shing or, for 2, -zhing]

–noun

1.	John Joseph (“Blackjack”), 1860–1948, U.S. general: commander of the American Expeditionary Forces in World War I.

Military.

a.	a 46-ton (42 m ton) U.S. heavy tank of 1944–52, with a five-man crew and a 90mm gun.

b.	a two-stage surface-to-surface ballistic missile.

[twen-tee-wuhn, twuhn-]

–noun

1.	a cardinal number, 20 plus 1.

2.	a symbol for this number, as 21 or XXI.

3.	a set of this many persons or things.

4.	Also, 21. Also called blackjack. a gambling game at cards, in which the object is to obtain from the dealer cards whose values add up to, or close to, 21 but which do not exceed it.

–adjective

5.	amounting to 21 in number.

Link To blackjack

black·jack (blāk'jāk')

A leather-covered bludgeon with a short, flexible shaft or strap, used as a hand weapon.
The blackjack oak.
Games A card game in which the object is to accumulate cards with a higher count than that of the dealer but not exceeding 21. Also called twenty-one, vingt-et-un.
Sphalerite.

tr.v. black·jacked, black·jack·ing, black·jacks

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