From The Collaborative International Dictionary of English v.0.48:

Occultism \Oc*cult"ism\, n.
   1. A certain Oriental system of theosophy. --A. P. Sinnett.
      [1913 Webster]

   2. Belief in occult powers or in supernatural forces other
      than the God of traditional religions, such as in magic,
      necromancy, alchemy, and astrology.

   3. The study and alleged use of supernatural agencies as in
      magic, astrology, witchcraft, alchemy, necromancy,
      spiritualism (communication with the dead), and
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