Source : Webster's Revised Unabridged Dictionary (1913)

Flock \Flock\, v. i. [imp. & p. p. {Flocked}; p. pr. & vb. n.
   {Flocking}.]
   To gather in companies or crowds.

         Friends daily flock.                     --Dryden.

   {Flocking fowl} (Zo["o]l.), the greater scaup duck.