Source : Webster's Revised Unabridged Dictionary (1913)

Spur \Spur\, n.
   1. (Mining) A branch of a vein.

   2. The track of an animal, as an otter; a spoor.

Spur \Spur\, n. [See {Sparrow}.] (Zo["o]l.)
   (a) A sparrow. [Scot.]
   (b) A tern. [Prov. Eng.]

Spur \Spur\, n. [OE. spure, AS. spura, spora; akin to D. spoor,
   G. sporn, OHG. sporo, Icel. spori, Dan. spore, Sw. sporre,
   and to AS. spor a trace, footstep, spyrian to trace, track,
   examine, and E. spurn. [root]171. Cf. {Sparrow}, {Spere},
   {Spoor}, {Spurn}.]
   1. An implement secured to the heel, or above the heel, of a
      horseman, to urge the horse by its pressure. Modern spurs
      have a small wheel, or rowel, with short points. Spurs
      were the badge of knighthood.

            And on her feet a pair of spurs large. --Chaucer.

Spur \Spur\, v. t. [imp. & p. p. {Spurred}; p. pr. & vb. n.
   {Spurring}.]
   1. To prick with spurs; to incite to a more hasty pace; to
      urge or goad; as, to spur a horse.

   2. To urge or encourage to action, or to a more vigorous
      pursuit of an object; to incite; to stimulate; to
      instigate; to impel; to drive.

            Love will not be spurred to what it loathes. --Shak.

   3. To put spurs on; as, a spurred boot.

Spur \Spur\, v. i.
   To spur on one' horse; to travel with great expedition; to
   hasten; hence, to press forward in any pursuit. ``Now spurs
   the lated traveler.'' --Shak.

         The Parthians shall be there, And, spurring from the
         fight, confess their fear.               --Dryden.

         The roads leading to the capital were covered with
         multitudes of yeomen, spurring hard to Westminster.
                                                  --Macaulay.

         Some bold men, . . . by spurring on, refine themselves.
                                                  --Grew.

Source : WordNet®

spur
     n 1: a verbalization that encourages you to attempt something;
          "the ceaseless prodding got on his nerves" [syn: {goad},
           {goading}, {prod}, {prodding}, {urging}, {spurring}]
     2: any pointed projection [syn: {spine}]
     3: tubular extension at the base of the corolla in some flowers
     4: a sharp prod fixed to a rider's heel and used to urge a
        horse onward; "cowboys know not to squat with their spurs
        on" [syn: {gad}]
     5: a railway line connected to a trunk line [syn: {branch line},
         {spur track}]
     [also: {spurring}, {spurred}]

spur
     v 1: incite or stimulate; "The Academy was formed to spur
          research"
     2: give heart or courage to [syn: {goad}]
     3: strike with a spur
     4: goad with spurs; "the rider spurred his horse"
     5: equip with spurs; "spur horses"
     [also: {spurring}, {spurred}]

Source : Free On-Line Dictionary of Computing

SPUR
     
        An early system on the {IBM 650}.
     
        [Listed in CACM 2(5):16 (May 1959)].
     
        (1994-12-01)