Source : Webster's Revised Unabridged Dictionary (1913)

Wisp \Wisp\, v. t. [imp. & p. p. {Wisped}; p. pr. & vb. n.
   {Wisping}.]
   1. To brush or dress, an with a wisp.

   2. To rumple. [Prov. Eng.] --Halliwell.

Wisp \Wisp\, n. [OE. wisp, wips; probably akin to D. & G. wisch,
   Icel. visk, and perhaps to L. virga a twig, rod. Cf. {Verge}
   a rod, {Whisk}, n.]
   1. A small bundle, as of straw or other like substance.

            In a small basket, on a wisp of hay.  --Dryden.

   2. A whisk, or small broom.

   3. A Will-o'-the-wisp; an ignis fatuus.

            The wisp that flickers where no foot can tread.
                                                  --Tennyson.

Source : WordNet®

wisp
     n 1: a small tuft or lock; "wisps of hair"
     2: a small person; "a mere wisp of a girl"
     3: a small bundle of straw or hay
     4: a flock of snipe

Source : Free On-Line Dictionary of Computing

Wisp
     
        ["An Experiment with a Self-Compiling Compiler for a Simple
        List-Processing Language", M.V. Wilkes, Ann Rev Automatic
        Programming 4:1-48.  (1964)].