1. Proper noun.  (given name, male) , also used as a pet form of John.
  2. Proper noun.  (informal) A sailor.
  3. Proper noun.  (informal, archaic) a soldier.
  4. Noun.  (slang) Jack Daniel's, a brand of American whiskey.
  5. Noun.  A mechanical device used to raise and (temporarily) support a heavy object.
  6. Noun.  A man or men in general.
  7. Noun.  A male animal.
  8. Noun.  (card games) The card ranking between the (term, ten) and (term, queen) of any suit, picturing a knave or prince on its face. In some card games has a value of eleven based on its rank, but in many card games has a value of ten like the ''ten'', ''queen'', and (term, king) cards. Also called a ''knave''.
  9. Noun.  (archaic) A knave (a servant or later, a deceitful man).
  10. Noun.  (zoology) A male ass.
  11. Noun.  A surface-mounted connector for electrical, especially telecommunications, equipment.
  12. Noun.  (sports) A target ball in bowls, etc; a jack-ball.
  13. Noun.  (games) A small, six-pointed playing piece used in the game of jacks.
  14. Noun.  (colloquial) Nothing, jackshit.
  15. Noun.  (nautical) A small flag at the bow of a ship.
  16. Noun.  (nautical) A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack.
  17. Noun.  (military) A coarse and cheap medieval coat of defense, especially one made of leather.
  18. Noun.  (two-up, lang en) A penny with a head on both sides, used for cheating. (Reference: Sidney J. Baker, ''The Australian Language'', second edition, 1966, chapter XI section 3, page 243.).
  19. Noun.  (slang) Money.
  20. Noun.  (slang, Appalachians) A smooth often ovoid large gravel or small cobble in a natural water course.
  21. Noun.  A common name for the freshwater pike, green pike or pickerel.
  22. Noun.  Large California rockfish.
  23. Noun.  An order of marine fish in the ''Carangidae'' family.
  24. Noun.  (obsolete, nautical) A sailor; a "jack tar".
  25. Verb.  (transitive) To use a jack.
  26. Verb.  (transitive, colloquial) To steal something, typically an automobile.
  27. Verb.  (transitive) To raise or increase.
  28. Verb.  (transitive, slang) To hit (the ball) hard; especially, to hit (the ball) out of the field, producing a home run.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.