Word.ws English Dictionary

black jack

black jack noun: any of certain species of Caranx of gamefish, including C. latus and C. crysos, but especially Caranx lugubris. Also the alternative form of blackjack.

black jack: any of certain species of Caranx of gamefish, including C. latus and C. crysos, but especially...
Image: NOAA Fisheries, Public domain, via Wikimedia Commons

Noun

black jack (countable and uncountable, plural black jacks)

  1. Any of certain species of Caranx of gamefish, including C. latus and C. crysos, but especially Caranx lugubris.
  2. Certain beggarticks (Bidens spp.), especially Bidens pilosa.
  3. (obsolete) Larva of a turnip sawfly (Athalia rosae)
    • There is a sort of black caterpillar called a black jack, which is seldom seen; but when they do come, they make terrible havock.1807, Richard Parkinson, The Experienced Farmer, Enlarged and Improved, page 370
  4. Sphalerite.
  5. A tufted or ring-necked scaup duck (Aythya collaris).
  6. Used other than figuratively or idiomatically: see black, jack.

Proper noun capitalized: Black Jack

Black Jack

  1. A city in Saint Louis County, Missouri, United States, named for a grove of blackjack oaks.

Also used as

black jack is also the alternative form of blackjack.

Synonyms of black jack

Forms of black jack

pluralblack jacks

Questions about black jack

What does black jack mean?
Black jack means any of certain species of Caranx of gamefish, including C. latus and C. crysos, but especially Caranx lugubris.
What part of speech is black jack?
Black jack can be a noun or a proper noun.
What is the plural of black jack?
The plural of black jack is black jacks.

Words near black jack in the dictionary

  1. Black International
  2. Black Irish
  3. black iron
  4. Black Isle
  5. black ivory
  6. black jack
  7. black jacks
  8. black jail
  9. black jails
  10. black jaundice
  11. Black Joe cake

Source and license

Adapted from Wiktionary: black jack (page history and authors); Black Jack (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “black jack.” Word.ws, https://word.ws/black_jack. Based on Wiktionary, CC BY-SA 4.0.