The Collaborative International Dictionary of English v.0.48:

Idolatry \I*dol"a*try\, n.; pl. Idolatries. [F. idol[^a]trie,
   LL. idolatria, L. idololatria, Fr. Gr. ?; ? idol + ?
   service.]
   1. The worship of idols, images, or anything which is not
      God; the worship of false gods.
      [1913 Webster]

            His eye surveyed the dark idolatries
            Of alienated Judah.                   --Milton.
      [1913 Webster]

   2. Excessive attachment or veneration for anything; respect
      or love which borders on adoration. --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

idolatry
    n 1: religious zeal; the willingness to serve God [syn:
         idolatry, devotion, veneration, cultism]
    2: the worship of idols; the worship of images that are not God
       [syn: idolatry, idol worship]