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.
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   2. The skins of certain wild animals with the fur; peltry;
      as, a cargo of furs.
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   3. Strips of dressed skins with fur, used on garments for
      warmth or for ornament.
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   4. pl. Articles of clothing made of fur; as, a set of furs
      for a lady (a collar, tippet, or cape, muff, etc.).
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            Wrapped up in my furs.                --Lady M. W.
                                                  Montagu.
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   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.
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   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.
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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.
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   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