The Collaborative International Dictionary of English v.0.48:

Forewoman \Fore"wom`an\, n.; pl. Forewomen.
   A woman who is chief; a woman who has charge of the work or
   workers in a shop or other place; a head woman. --Tatler.
   --W. Besant.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forewoman
    n 1: a woman who is foreperson of a jury [syn: forewoman,
         forelady]
    2: a woman in charge of a group of workers