The Collaborative International Dictionary of English v.0.48:

Wardrobe \Ward"robe`\, n. [OE. warderobe, OF. warderobe, F.
   garderobe; of German origin. See Ward, v. t., and Robe.]
   [1913 Webster]
   1. A room or apartment where clothes are kept, or wearing
      apparel is stored; a portable closet for hanging up
      clothes.
      [1913 Webster]

   2. Wearing apparel, in general; articles of dress or personal
      decoration.
      [1913 Webster]

            Flowers that their gay wardrobe wear. --Milton.
      [1913 Webster]

            With a pair of saddlebags containing his wardrobe.
                                                  --T. Hughes.
      [1913 Webster]

   3. A privy. [Obs.] --Chaucer.
      [1913 Webster]

WordNet (r) 3.0 (2006):

wardrobe
    n 1: a tall piece of furniture that provides storage space for
         clothes; has a door and rails or hooks for hanging clothes
         [syn: wardrobe, closet, press]
    2: collection of clothing belonging to one person
    3: collection of costumes belonging to a theatrical company

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "wardrobe":
   accouterments, caparison, cloakroom, closet, clothes closet,
   dressing room, fitting room, furnishings, getup, harness,
   linen closet, livery, outfit, rig, things, trappings, trousseau,
   turnout