from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A leather-covered bludgeon with a short, flexible shaft or strap, used as a hand weapon.
  • noun 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.
  • noun Sphalerite.
  • transitive verb To hit or beat with a blackjack.
  • transitive verb To coerce by threats.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun card games A common gambling card game in casinos, where the object is to get as close to 21 without going over.
  • noun card games A hand in the game of blackjack consisting of a face card and an ace.
  • noun The flag (i.e., a jack) traditionally flown by pirate ships; popularly thought to be a white skull and crossed bones on a black field (the Jolly Roger). In older literature sometimes spelled "black jack".
  • noun a small, flat, blunt, usually leather-covered instrument loaded with heavy material such as lead or ball bearings.
  • noun a type of weed, Bidens pilosa, in the family Compositae.
  • verb To strike with a blackjack or similar weapon.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb exert pressure on someone through threats
  • noun a flag usually bearing a white skull and crossbones on a black background; indicates a pirate ship
  • noun 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
  • noun a piece of metal covered by leather with a flexible handle; used for hitting people
  • noun 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


Sorry, no etymologies found.


The word blackjack has been adopted by online blackjack.

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  • one of a handful of English words containing the letters j and k occurring adjacently in reverse alphabetical order. See also lockjaw, Reykjavik, and stockjobber.

    November 12, 2007

  • Did you get inkjet, too?

    November 12, 2007

  • Shockjock has 24,000 google hits - which doesn't make it right, but still...

    Cool idea for a list.

    November 12, 2007

  • How about "buckjumper" and "crackjaw"?

    November 12, 2007

  • More importantly, all of the the words that have kj that pronounce both letters are compound words. The j in Reykjavik is different than the normal English j.

    November 13, 2007

  • "On primary election day in 1917, several Vare workers blackjacked two leaders of an opposing faction, then beat to death a policeman who intervened."

    —John M. Barry, The Great Influenza (NY: Penguin Books, 2004), 199

    I had never seen this term used as a verb before.

    February 16, 2009