The Collaborative International Dictionary of English v.0.48:

Flock \Flock\, n. [OE. flokke; cf. D. vlok, G. flocke, OHG.
   floccho, Icel. fl[=o]ki, perh. akin to E. flicker, flacker,
   or cf. L. floccus, F. floc.]
   1. A lock of wool or hair.
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            I prythee, Tom, beat Cut's saddle, put a few flocks
            in the point [pommel].                --Shak.
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   2. Woolen or cotton refuse (sing. or pl.), old rags, etc.,
      reduced to a degree of fineness by machinery, and used for
      stuffing unpholstered furniture.
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   3. Very fine, sifted, woolen refuse, especially that from
      shearing the nap of cloths, used as a coating for wall
      paper to give it a velvety or clothlike appearance; also,
      the dust of vegetable fiber used for a similar purpose.
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   Flock bed, a bed filled with flocks or locks of coarse
      wool, or pieces of cloth cut up fine. "Once a flock bed,
      but repaired with straw." --Pope.

   Flock paper, paper coated with flock fixed with glue or
      size.
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