The Collaborative International Dictionary of English v.0.48:

Furniture \Fur"ni*ture\, n. [F. fourniture. See Furnish, v.
   t.]
   1. That with which anything is furnished or supplied;
      supplies; outfit; equipment.
      [1913 Webster]

            The form and all the furniture of the earth.
                                                  --Tillotson.
      [1913 Webster]

            The thoughts which make the furniture of their
            minds.                                --M. Arnold.
      [1913 Webster]

   2. Articles used for convenience or decoration in a house or
      apartment, as tables, chairs, bedsteads, sofas, carpets,
      curtains, pictures, vases, etc.
      [1913 Webster]

   3. The necessary appendages to anything, as to a machine, a
      carriage, a ship, etc.
      (a) (Naut.) The masts and rigging of a ship.
      (b) (Mil.) The mountings of a gun.
      (c) Builders' hardware such as locks, door and window
          trimmings.
      (d) (Print) Pieces of wood or metal of a lesser height
          than the type, placed around the pages or other matter
          in a form, and, with the quoins, serving to secure the
          form in its place in the chase.
          [1913 Webster]

   4. (Mus.) A mixed or compound stop in an organ; -- sometimes
      called mixture.
      [1913 Webster]

WordNet (r) 3.0 (2006):

furniture
    n 1: furnishings that make a room or other area ready for
         occupancy; "they had too much furniture for the small
         apartment"; "there was only one piece of furniture in the
         room" [syn: furniture, piece of furniture, article of
         furniture]

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "furniture":
   Intertype, Linotype, Monotype, accessories, accouterments,
   apparatus, appliances, appointments, appurtenances, armament,
   belongings, chattels, clobber, cold-type typesetting, composing,
   composing stick, composition, computerized typesetting,
   conveniences, devices, duffel, dummy, effects, equipage, equipment,
   facilities, facility, fittings, fixtures, furnishings,
   galley chase, gear, home furnishings, hot-metal typesetting,
   impedimenta, imposition, installations, justification, kit, layout,
   line of type, machinery, materiel, movables, munition, munitions,
   outfit, paraphernalia, photocomposition, photosetting,
   phototypesetter, phototypesetting machine, plant, plumbing,
   possessions, quoin, rig, rigging, setting, shit, slug,
   stock-in-trade, stuff, tack, tackle, things, trappings,
   typesetting, typesetting machine, utensils



Bouvier's Law Dictionary, Revised 6th Ed (1856):

FURNITURE. Personal chattels in the use of a family. By the term household
furniture in a will, all personal chattels will pass which may contribute to
the use or convenience of the householder, or the ornament of the house; as,
plate, linen, china, both useful and ornamental, and pictures. Amb. 610; 1
John. Ch. R. 329, 388; 1 Sim. & Stu. 189; S. C. 3 Russ. Ch. Cas. 301; 2
Williams on Ex. 752; 1 Rop. on Leg. 203-4; 3 Ves. 312, 313.