Source : Webster's Revised Unabridged Dictionary (1913)

Imp \Imp\, n. [OE. imp a graft, AS. impa; akin to Dan. ympe, Sw.
   ymp, prob. fr. LL. impotus, Gr. ? engrafted, innate, fr. ? to
   implant; ? in + ? to produce; akin to E. be. See 1st {In-},
   {Be}.]
   1. A shoot; a scion; a bud; a slip; a graft. [Obs.]
      --Chaucer.

   2. An offspring; progeny; child; scion. [Obs.]

            The tender imp was weaned.            --Fairfax.

   3. A young or inferior devil; a little, malignant spirit; a
      puny demon; a contemptible evil worker.

            To mingle in the clamorous fray Of squabbling imps.
                                                  --Beattie.

   4. Something added to, or united with, another, to lengthen
      it out or repair it, -- as, an addition to a beehive; a
      feather inserted in a broken wing of a bird; a length of
      twisted hair in a fishing line. [Obs. or Prov. Eng.]

Imp \Imp\, v. t. [imp. & p. p. {Imped}; p. pr. & vb. n.
   {Imping}.] [AS. impian to imp, ingraft, plant; akin to Dan.
   ympe, Sw. ympa, OHG. impf[=o]n, impit[=o]n, G. impfen. See
   {Imp}, n.]
   1. To graft; to insert as a scion. [Obs.] --Rom. of R.

   2. (Falconry) To graft with new feathers, as a wing; to
      splice a broken feather. Hence, Fig.: To repair; to
      extend; to increase; to strengthen to equip. [Archaic]

            Imp out our drooping country's broken wing. --Shak.

            Who lazily imp their wings with other men's plumes.
                                                  --Fuller.

            Here no frail Muse shall imp her crippled wing.
                                                  --Holmes.

            Help, ye tart satirists, to imp my rage With all the
            scorpions that should whip this age.  --Cleveland.

Source : WordNet®

imp
     n 1: (folklore) fairies that are somewhat mischievous [syn: {elf},
           {hob}, {gremlin}, {pixie}, {pixy}, {brownie}]
     2: one who is playfully mischievous [syn: {scamp}, {monkey}, {rascal},
         {rapscallion}, {scalawag}, {scallywag}]

Source : Free On-Line Dictionary of Computing

IMP
     
        1.  {IMProved Mercury autocode}.
     
        2.  An extensible dialect of {ALGOL 60}, for {CDC
        1604}.
     
        ["Experience with an Extensible Language", Edgar T. Irons,
        CACM 13(1):31-39, Jan 1970].
     
        3.  {Interpretive Menu Processor}.
     
        4.  {IMPlementation language}.
     
        5.  {Interface Message Processor}.
     
        (1996-04-07)