Source : Webster's Revised Unabridged Dictionary (1913)

Smock \Smock\, a.
   Of or pertaining to a smock; resembling a smock; hence, of or
   pertaining to a woman.

   {Smock mill}, a windmill of which only the cap turns round to
      meet the wind, in distinction from a post mill, whose
      whole building turns on a post.

   {Smock race}, a race run by women for the prize of a smock.
      [Prov. Eng.]