What does "smock" mean?

Additional senses

1. 2.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.]
2. 3.To provide with, or clothe in, a smock or a smock frock. Tennyson.