• enPR: blăk'jăk, IPA: /ˈblækdʒæk/


  1. (card games) A common gambling card game in casinos, where the object is to get as close to 21 without going over.
  2. (card games) A hand in the game of blackjack consisting of a face card and an ace.
  3. 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).
  4. (weapons) A small, flat, blunt, usually leather-covered weapon loaded with heavy material such as lead or ball bearings, intended to inflict a blow to the head that renders the victim unconscious with diminished risk of lasting cranial trauma.
    cot en
  5. Any of several species of weed of genus Bidens, such as Bidens pilosa, in the family Compositae.
  6. A blackjack oak.
    • 1931, William Faulkner, Sanctuary, Library of America, 1985, p.20:
      A steep slope rose, crested by stunted blackjacks.
Translations Translations
  • French: pavillon de pirates
  • Spanish: bandera pirata
Translations Verb

blackjack (blackjacks, present participle blackjacking; past blackjacked, past participle blackjacked)

  1. To strike with a blackjack or similar weapon.


blackjack (plural blackjacks)

  1. (slang) A fan of the South Korean girl group 2NE1.
    • 2014, Julie Carlson, "2NE1 Comeback ↗", Hallyu Magazine, Issue #11, Winter 2014, page 41 (approx.):
      The queens of K-pop, 2NE1, are gearing up for their world tour in March and Blackjacks could not be more excited!
    • 2014, Chester Chin, "[ 2NE1 in concert: Sassy and fierce]", The Star (Malaysia), 29 May 2014:
      It’s this sort of brash ethos that resonates with Blackjacks (as 2NE1’s fans are known).
    • 2014, Lainey, "2NE1 Gives Their All For Malaysia ↗", Campus Plus, Issue 91, July 2014, page 58:
      Most of these 'Blackjacks' have waited five years since 2NE1's debut to finally see the girls (CL, Bom, Dara, Minzy) perform a full show in Malaysia.

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