The Collaborative International Dictionary of English v.0.48:

Footman \Foot"man\, n.; pl. Footmen.
   1. A soldier who marches and fights on foot; a foot soldier.
      [1913 Webster]

   2. A man in waiting; a male servant whose duties are to
      attend the door, the carriage, the table, etc.
      [1913 Webster]

   3. Formerly, a servant who ran in front of his master's
      carriage; a runner. --Prior.
      [1913 Webster]

   4. A metallic stand with four feet, for keeping anything warm
      before a fire.
      [1913 Webster]

   5. (Zool.) A moth of the family Lithosid[ae]; -- so called
      from its livery-like colors.
      [1913 Webster]

WordNet (r) 3.0 (2006):

footman
    n 1: a man employed as a servant in a large establishment (as a
         palace) to run errands and do chores