The Collaborative International Dictionary of English v.0.48:

Foreman \Fore"man\, n.; pl. Foremen.
   The first or chief man; as:
   (a) The chief man of a jury, who acts as their speaker.
   (b) The chief of a set of hands employed in a shop, or on
       works of any kind, who superintends the rest; an
       overseer.
       [1913 Webster]

WordNet (r) 3.0 (2006):

foreman
    n 1: a person who exercises control over workers; "if you want
         to leave early you have to ask the foreman" [syn:
         foreman, chief, gaffer, honcho, boss]
    2: a man who is foreperson of a jury