NOUN (4)

1. a small tuft or lock;
- Example: "wisps of hair"

2. a small person;
- Example: "a mere wisp of a girl"

3. a small bundle of straw or hay;

4. a flock of snipe;

The Collaborative International Dictionary of English v.0.48:

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.]
   [1913 Webster]
   1. A small bundle, as of straw or other like substance.
      [1913 Webster]

            In a small basket, on a wisp of hay.  --Dryden.
      [1913 Webster]

   2. A whisk, or small broom.
      [1913 Webster]

   3. A Will-o'-the-wisp; an ignis fatuus.
      [1913 Webster]

            The wisp that flickers where no foot can tread.
                                                  --Tennyson.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wisp \Wisp\, v. t. [imp. & p. p. Wisped; p. pr. & vb. n.
   Wisping.]
   [1913 Webster]
   1. To brush or dress, an with a wisp.
      [1913 Webster]

   2. To rumple. [Prov. Eng.] --Halliwell.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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

The Free On-line Dictionary of Computing (19 January 2023):

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)].