The Collaborative International Dictionary of English v.0.48:

Fetich \Fe"tich\, Fetish \Fe"tish\, n.[F. f['e]tiche, from Pg.
   feiti?o, adj., n., sorcery, charm, fr. L. facticius made by
   art, artifical, factitious. See Factitious.]
   1. A material object supposed among certain African tribes to
      represent in such a way, or to be so connected with, a
      supernatural being, that the possession of it gives to the
      possessor power to control that being.
      [1913 Webster]

   2. Any object to which one is excessively devoted. fetichism

WordNet (r) 3.0 (2006):

fetich
    n 1: a charm superstitiously believed to embody magical powers
         [syn: juju, voodoo, hoodoo, fetish, fetich]
    2: excessive or irrational devotion to some activity; "made a
       fetish of cleanliness" [syn: fetish, fetich]