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]

The Collaborative International Dictionary of English v.0.48:

Robe \Robe\, v. t. [imp. & p. p. Robed; p. pr. & vb. n.
   Robing.]
   To invest with a robe or robes; to dress; to array; as,
   fields robed with green.
   [1913 Webster]

         The sage Chaldeans robed in white appeared. --Pope.
   [1913 Webster]

         Such was his power over the expression of his
         countenance, that he could in an instant shake off the
         sternness of winter, and robe it in the brightest
         smiles of spring.                        --Wirt.
   [1913 Webster]

WordNet (r) 3.0 (2006):

robe
    n 1: any loose flowing garment
    2: outerwear consisting of a long flowing garment used for
       official or ceremonial occasions [syn: gown, robe]
    v 1: clothe formally; especially in ecclesiastical robes [syn:
         vest, robe]
    2: cover as if with clothing; "the mountain was clothed in
       tropical trees" [syn: clothe, cloak, drape, robe]

Moby Thesaurus II by Grady Ward, 1.0:

100 Moby Thesaurus words for "robe":
   afghan, apparel, appurtenances, array, attire, bathrobe, bed linen,
   bedclothes, bedcover, bedding, bedeck, bedrape, bedsheet,
   bedspread, blanket, buffalo robe, bundle up, caftan, case, cassock,
   cloak, clothe, clothes, clothing, comfort, comforter,
   contour sheet, costume, counterpane, cover, coverlet, coverlid,
   deck, dight, drape, dress, dud, duds, eiderdown, enclothe, endue,
   enrobe, enshroud, envelop, enwrap, equipage, finery, fitted sheet,
   frock, garb, garment, garments, gear, gown, habilitate, habit,
   housecoat, invest, kimono, lap, lap robe, linen, livery,
   lounging robe, mantle, muffle up, muu-muu, outfit, panoply,
   paraphernalia, patchwork quilt, pillow slip, pillowcase, quilt,
   rag, rag out, raiment, regalia, rig, robes, rug, sheathe, sheet,
   sheeting, shroud, slip, spread, surplice, swaddle, swathe, tire,
   togs, trappings, uniform, vestment, vestments, vesture, wrap,
   wrap up, wrapper