The Collaborative International Dictionary of English v.0.48:

Fur \Fur\, a.
   Of or pertaining to furs; bearing or made of fur; as, a fur
   cap; the fur trade.
   [1913 Webster]

   Fur seal (Zool.) one of several species of seals of the
      genera Callorhinus and Arclocephalus, inhabiting the
      North Pacific and the Antarctic oceans. They have a coat
      of fine and soft fur which is highly prized. The northern
      fur seal (Callorhinus ursinus) breeds in vast numbers on
      the Prybilov Islands, off the coast of Alaska; -- called
      also sea bear.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fur \Fur\ (f[^u]r), n. [OE. furre, OF. forre, fuerre, sheath,
   case, of German origin; cf. OHG. fuotar lining, case, G.
   futter; akin to Icel. f[=o][eth]r lining, Goth. f[=o]dr,
   scabbard; cf. Skr. p[=a]tra vessel, dish. The German and
   Icel. words also have the sense, fodder, but this was
   probably a different word originally. Cf. Fodder food,
   Fother, v. t., Forel, n.]
   [1913 Webster]
   1. The short, fine, soft hair of certain animals, growing
      thick on the skin, and distinguished from the hair, which
      is longer and coarser.
      [1913 Webster]

   2. The skins of certain wild animals with the fur; peltry;
      as, a cargo of furs.
      [1913 Webster]

   3. Strips of dressed skins with fur, used on garments for
      warmth or for ornament.
      [1913 Webster]

   4. pl. Articles of clothing made of fur; as, a set of furs
      for a lady (a collar, tippet, or cape, muff, etc.).
      [1913 Webster]

            Wrapped up in my furs.                --Lady M. W.
                                                  Montagu.
      [1913 Webster]

   5. Any coating considered as resembling fur; as:
      (a) A coat of morbid matter collected on the tongue in
          persons affected with fever.
      (b) The soft, downy covering on the skin of a peach.
      (c) The deposit formed on the interior of boilers and
          other vessels by hard water.
          [1913 Webster]

   6. (Her.) One of several patterns or diapers used as
      tinctures. There are nine in all, or, according to some
      writers, only six. --See Tincture.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fur \Fur\, v. t. [imp. & p. p. Furred; p. pr. & vb. n.
   Furring.]
   1. To line, face, or cover with fur; as, furred robes. "You
      fur your gloves with reason." --Shak.
      [1913 Webster]

   2. To cover with morbid matter, as the tongue.
      [1913 Webster]

   3. (Arch.) To nail small strips of board or larger scantling
      upon, in order to make a level surface for lathing or
      boarding, or to provide for a space or interval back of
      the plastered or boarded surface, as inside an outer wall,
      by way of protection against damp. --Gwill.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fur
    n 1: the dressed hairy coat of a mammal [syn: fur, pelt]
    2: dense coat of fine silky hairs on mammals (e.g., cat or seal
       or weasel)
    3: a garment made of the dressed hairy coat of a mammal

Moby Thesaurus II by Grady Ward, 1.0:

211 Moby Thesaurus words for "fur":
   Australian seal, Leatherette, Leatheroid, achievement, alerion,
   animal charge, annulet, argent, armorial bearings, armory, arms,
   azure, bandeau, bar, bar sinister, baton, bearings, bearskin,
   beaver, beaverette, bend, bend sinister, billet, black fox,
   black marten, black sable, blazon, blazonry, bordure, bristle,
   broad arrow, brook mink, buckskin, cadency mark, calf, calfskin,
   canton, capeskin, capillament, cat, chaplet, charge, chevron,
   chief, chinchilla, chinchillette, cilium, coast seal, coat,
   coat of arms, coating, cockatrice, coney, coronet, cowhide,
   crescent, crest, cross, cross moline, crown, cuticle, deerskin,
   dermis, device, difference, differencing, doeskin, down, eagle,
   eiderdown, electric seal, enamel, ermine, ermines, erminites,
   erminois, escutcheon, facing, falcon, fell, fess, fess point,
   field, file, film, flanch, fleece, flesh, fleur-de-lis, floss,
   flue, fluff, fox, fret, furring, furs, fusil, fuzz, garland, genet,
   goatskin, griffin, gules, gyron, hair, hatchment, helmet,
   heraldic device, hide, honor point, horsehair, imitation fur,
   imitation leather, impalement, impaling, inescutcheon, integument,
   jacket, jaguar, label, lacquer, lapin, leather, leather paper,
   leopard, lint, lion, lozenge, mane, mantling, marmot, marshaling,
   marten, martlet, mascle, merino, metal, mink, mole, moleskin,
   monkey, motto, mullet, muskrat, nombril point, nutria, octofoil,
   or, ordinary, orle, otter, outer layer, outer skin, paint, pale,
   paly, pean, pellicle, pelt, peltry, pelts, pheon, pigskin, pile,
   pubescence, pubic hair, purpure, quarter, quartering, rabbit,
   rabbitskin, raccoon, rawhide, revetment, rind, rose, sable,
   saltire, scale, scum, scutcheon, seal, setula, shag, shagreen,
   sheath, sheepskin, shield, skin, skins, skunk, spread eagle,
   squirrel, subordinary, swansdown, tegument, tenne, thistledown,
   tiger, tincture, torse, tressure, unicorn, vair, varnish, veneer,
   vert, white fox, wool, wreath, yale