The Collaborative International Dictionary of English v.0.48:

Robe \Robe\, n. [F., fr. LL. rauba a gown, dress, garment;
   originally, booty, plunder. See Rob, v. t., and cf.
   Rubbish.]
   1. An outer garment; a dress of a rich, flowing, and elegant
      style or make; hence, a dress of state, rank, office, or
      the like.
      [1913 Webster]

            Through tattered clothes small vices do appear;
            Robes and furred gowns hide all.      --Shak.
      [1913 Webster]

   2. A skin of an animal, especially, a skin of the bison,
      dressed with the fur on, and used as a wrap. [U.S.]
      [1913 Webster]

   Master of the robes, an officer of the English royal
      household (when the sovereign is a king) whose duty is
      supposed to consist in caring for the royal robes.

   Mistress of the robes, a lady who enjoys the highest rank
      of the ladies in the service of the English sovereign
      (when a queen), and is supposed to have the care her
      robes.
      [1913 Webster]