Definitions of jack

  1. To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5.
  2. To lift with a jack.
  3. To hunt game at night by means of a jack. See 2d Jack, n., 4, n.
  4. a man who serves as a sailor
  5. any of several fast- swimming predacious fishes of tropical to warm- temperate seas
  6. one of four face cards in a deck bearing a picture of a young prince
  7. small flag indicating a ship's nationality
  8. game equipment consisting of one of several small objects picked up while bouncing a ball in the game of jacks
  9. an electrical device consisting of a connector socket designed for the insertion of a plug
  10. immense East Indian fruit resembling breadfruit of; its seeds are commonly roasted
  11. someone who works with their hands; someone engaged in manual labor
  12. lift with a special device; " jack up the car so you can change the tire"
  13. A large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow.
  14. A familiar nickname of, or substitute for, John.
  15. An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic.
  16. A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat.
  17. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack
  18. A device to pull off boots.
  19. A sawhorse or sawbuck.
  20. A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
  21. A wooden wedge for separating rocks rent by blasting.
  22. A lever for depressing the sinkers which push the loops down on the needles.
  23. A grating to separate and guide the threads; a heck box.
  24. A machine for twisting the sliver as it leaves the carding machine.
  25. A compact, portable machine for planing metal.
  26. A machine for slicking or pebbling leather.
  27. A system of gearing driven by a horse power, for multiplying speed.
  28. A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
  29. In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
  30. The small bowl used as a mark in the game of bowls.
  31. The male of certain animals, as of the ass.
  32. A young pike; a pickerel.
  33. The jurel.
  34. The wall- eyed pike.
  35. A drinking measure holding half a pint; also, one holding a quarter of a pint.
  36. The knave of a suit of playing cards.
  37. A coarse and cheap mediaeval coat of defense, esp. one made of leather.
  38. A popular colloquial name for a sailor; - called also tar, and afloat.
  39. In the harpsichord, an intermediate piece communicating the action of the key to the quill; - called also hopper.
  40. A large, California rock fish ( Sebastodes paucispinus); - called also boccaccio, and merou.
  41. A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; - called also union jack. The American jack is a small blue flag, with a star for each State.
  42. A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; - called also jack crosstree.
  43. A pitcher or can of waxed leather; - called also black jack.
  44. A fish; called also a pike; in bowls, a small ball serving as a mark to be aimed at; the male of some animals; a leather cup or jug; timber cut short of its ususal length; a small flag used as a signal, bearing the same device as the union jack; the knave of cards, a leathern coat of armor; a name applied to various kinds of levers or mechanical labor saving devices; as, a jack screw, roasting- jack, etc.
  45. Used as a familiar name or diminutive of John; a saucy or paltry fellow: a sailor: any instrument serving to supply the place of a boy or helper, as a bootjack for taking off boots, a contrivance for turning a spit, a screw for raising heavy weights: the male of some animals: a young pike: a support to saw wood on: a miner's wedge: a flag displayed from the bowsprit of a ship: a coat of mail.
  46. A nick- name of John; name given to various instruments to supply the place of a helper; small flag.
  47. A nickname for John, James, or Jacob.
  48. A handy tool.
  49. A diminutive of John; a saucy or paltry fellow; a sailor; any instrument that supplies the place of a boy, as a boot- jack; a portable machine for raising great weights through a small space; a contrivance to turn a spit; a young pike; a coat of mail; a pitcher of waxed leather; a small bowl thrown out for a mark to the bowlers; the male of certain animals; a horse or wooden frame on which wood or timber is sawed; the knave of cards; a flag, ensign, or colour, displayed from a staff on the end of a bowsprit. Jack of all trades, a person who can turn his hand to any kind of business. Jack by the hedge, a piant growing under hedges. Jack in a box, a plant; a large wooden male screw, turning in a female one; a figure made to start out of a box. Jack in office, one who assumes authority on account of his office. Jack of the clock- house, a little man that strikes the quarters in a clock. Jack with a lantern, an ignis fatuns, or will- o- the- wisp. Union Jack. See Union.
  50. A name applied as an expression of familiarity; any mechanical contrivance for replacing the personal service of an attendant; a screw for raising heavy weights; a contrivance to turn a spit; any timber cut short of its usual length; a flag or ensign; a sailor - usually in composition, as jack- tar; a prefix signifying male, as jack- ass.
  51. A homely substitute for a coat of mail; a short loose coat terminating at the waist.