The Collaborative International Dictionary of English v.0.48:

fetichism \fe"tich*ism\, Fetishism \Fe"tish*ism\ (? or ?); 277),
   n.[Cf. F. f['e]tichisme.] [Written also feticism.]
   1. The doctrine or practice of belief in fetiches.
      [1913 Webster]

   2. Excessive devotion to one object or one idea; abject
      superstition; blind adoration.
      [1913 Webster]

            The real and absolute worship of fire falls into two
            great divisions, the first belonging rather to
            fetichism, the second to polytheism proper. --Tylor.
      Fetichist

The Collaborative International Dictionary of English v.0.48:

Fetish \Fe"tish\, n., Fetishism \Fe"tish*ism\ (? or ?; 277), n.,
Fetishistic \Fe`tish*is"tic\, a.
   See Fetich, n., Fetichism, n., Fetichistic, a.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fetishism
    n 1: a belief in the magical power of fetishes (or the worship
         of a fetish) [syn: fetishism, fetichism]
    2: sexual arousal or gratification resulting from handling a
       fetish (or a specific part of the body other than the sexual
       organs) [syn: fetishism, fetichism]