The Collaborative International Dictionary of English v.0.48:

Hanger \Hang"er\ (-[~e]r), n.
   1. One who hangs, or causes to be hanged; a hangman.
      [1913 Webster]

   2. That by which a thing is suspended. Especially:
      (a) A strap hung to the girdle, by which a dagger or sword
          is suspended.
      (b) (Mach.) A part that suspends a journal box in which
          shafting runs. See Illust. of Countershaft.
      (c) A bridle iron.
          [1913 Webster]

   3. That which hangs or is suspended, as a sword worn at the
      side; especially, in the 18th century, a short, curved
      sword.
      [1913 Webster]

   4. A steep, wooded declivity. [Eng.] --Gilbert White.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bridle iron \Bri"dle i`ron\ (Arch.)
   A strong flat bar of iron, so bent as to support, as in a
   stirrup, one end of a floor timber, etc., where no sufficient
   bearing can be had; -- called also stirrup and hanger.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hanger
    n 1: a worker who hangs something
    2: anything from which something can be hung