The Collaborative International Dictionary of English v.0.48:

Selvage \Sel"vage\, Selvedge \Sel"vedge\, n. [Self + edge, i.
   e., its own proper edge; cf. OD. selfegge.]
   1. The edge of cloth which is woven in such a manner as to
      prevent raveling.
      [1913 Webster]

   2. The edge plate of a lock, through which the bolt passes.
      --Knight.
      [1913 Webster]

   3. (Mining.) A layer of clay or decomposed rock along the
      wall of a vein. See Gouge, n., 4. --Raymond.
      [1913 Webster] Selvaged

WordNet (r) 3.0 (2006):

selvedge
    n 1: border consisting of an ornamental fringe at either end of
         an oriental carpet [syn: selvage, selvedge]
    2: the edge of a fabric that is woven so that it will not ravel
       or fray [syn: selvage, selvedge]