The Collaborative International Dictionary of English v.0.48:

Jumper \Jump"er\, n. [See 1st Jump.]
   1. A loose upper garment; as:
      (a) A sort of blouse worn by workmen over their ordinary
          dress to protect it.
      (b) A fur garment worn in Arctic journeys.
          [1913 Webster]

   2. A sleeveless one-piece dress, either with full shoulders
      or straps, sometimes with only the front part of the
      bodice, usually worn by women with a blouse underneath.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

jumper \jump"er\ (j[u^]mp"[~e]r), n.
   1. One who, or that which, jumps.
      [1913 Webster]

   2. A long drilling tool used by masons and quarrymen.
      [1913 Webster]

   3. A rude kind of sleigh; -- usually, a simple box on runners
      which are in one piece with the poles that form the
      thills. [U.S.] --J. F. Cooper.
      [1913 Webster]

   4. (Zool.) The larva of the cheese fly. See Cheese fly,
      under Cheese.
      [1913 Webster]

   5. (Eccl.) A name applied in the 18th century to certain
      Calvinistic Methodists in Wales whose worship was
      characterized by violent convulsions.
      [1913 Webster]

   6. (Horology) spring to impel the star wheel, also a pawl to
      lock fast a wheel, in a repeating timepiece.
      [1913 Webster]

   Baby jumper. See in the Vocabulary.

   Bounty jumper. See under Bounty.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

jumper \jump"er\, n.
   1. A thing that jumps; esp., any of various tools or other
      contrivances operating with a jumping motion; as, (Mining,
      Quarrying, etc.), an instrument for boring holes in rocks
      by percussion without hammering, consisting of a bar of
      iron with a chisel-edged steel tip at one or both ends,
      operated by striking it against the rock, turning it
      slightly with each blow.
      [Webster 1913 Suppl.]

   2. (Electronics) a short wire, or a small plastic object
      containing such a short wire, used to optionally connect
      or disconnect two points in an electronic circuit, so as
      to include or exclude portions of the circuit and thus
      modify the function of the circuit. Such jumpers are much
      used to adapt add-on circuit boards for different
      conditions or functions within a computer.

   Note: The contacts to which jumpers connect in commercially
         produced circuit boards are typically two closely
         spaced short stiff wires standing perpendicular to the
         plane of the circuit board, and the jumper has two
         holes with spacing identical to that of the contacts
         wires, so as to allow convenient insertion or removal
         of the jumper.
         [PJC]

The Collaborative International Dictionary of English v.0.48:

jumper \jump"er\, v. t. (electronics)
   to insert a jumper[2] between the two contacts in (a
   circuit). See 2nd jumper.
   [PJC]

WordNet (r) 3.0 (2006):

jumper
    n 1: a person who jumps; "as the jumper neared the ground he
         lost control"; "the jumper's parachute opened"
    2: an athlete who competes at jumping; "he is one hell of a
       jumper"
    3: a crocheted or knitted garment covering the upper part of the
       body [syn: sweater, jumper]
    4: a coverall worn by children
    5: a small connector used to make temporary electrical
       connections
    6: a loose jacket or blouse worn by workmen
    7: a sleeveless dress resembling an apron; worn over other
       clothing [syn: jumper, pinafore, pinny]
    8: (basketball) a player releases the basketball at the high
       point of a jump [syn: jumper, jump shot]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "jumper":
   amateur athlete, archer, athlete, baby clothes, baby linen,
   ballplayer, baseballer, baseman, batter, battery, blocking back,
   bowman, broad jumper, bucking bronco, buckjumper, catcher, center,
   coach, competitor, creepers, cricketer, deep-sea diver,
   defensive lineman, diver, end, flea, footballer, free diver, frog,
   frogman, games-player, gamester, gazelle, goat, grasshopper, guard,
   high jumper, hopper, hurdle racer, hurdler, infielder, jackrabbit,
   jock, jumpers, jumping bean, jumping jack, kangaroo, layette,
   leaper, lineman, offensive lineman, outfield, outfielder,
   parachute jumper, pearl diver, player, plunger, pole vaulter,
   poloist, professional athlete, pugilist, quarterback, racer,
   rompers, salmon, scuba diver, skater, skin diver, sky diver,
   snorkel diver, sport, sportsman, stag, sunfisher, swaddle,
   swaddling clothes, tackle, tailback, timber topper, toxophilite,
   vaulter, wingback, wrestler



The Free On-line Dictionary of Computing (30 December 2018):

jumper

    A removable wire or small plug whose presence or
   absence is used to determine some aspect of hardware
   configuration.

   (1995-03-14)