1. [n]  a player releases the basketball at the high point of a jump
2. [n]  a sleeveless dress resembling an apron; worn over other clothing
3. [n]  a loose jacket or blouse worn by workmen
4. [n]  a small connector used to make temporary electrical connections
5. [n]  an athlete who bounds or leaps (as in basketball)
6. [n]  an athlete who competes at jumping

1. \Jump"er\, n.
   1. One who, or that which, jumps.
   
   2. A long drilling tool used by masons and quarrymen.
   
   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.
   
   4. (Zo["o]l.) The larva of the cheese fly. See {Cheese fly},
      under {Cheese}.
   
   5. (Eccl.) A name applied in the 18th century to certain
      Calvinistic Methodists in Wales whose worship was
      characterized by violent convulsions.
   
   6. (Horology) spring to impel the star wheel, also a pawl to
      lock fast a wheel, in a repeating timepiece.
   
   {Baby jumper}. See in the Vocabulary.
   
   {Bounty jumper}. See under {Bounty}.
   
   

2. \Jump"er\, n. [See 1st {Jump}.]
   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.
   
   

3. \Jump"er\, n.
   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.
   
   

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