Source : Webster's Revised Unabridged Dictionary (1913)

Redcap \Red"cap`\, n.
   1. (Zo["o]l) The European goldfinch.

   2. A specter having long teeth, popularly supposed to haunt
      old castles in Scotland. [Scot.] --Jamieson.

Source : WordNet®

redcap
     n 1: a member of the military police in Britain
     2: a porter who helps passengers with their baggage at a
        railroad station