'Demonism' definitions:

Definition of 'demonism'

From: WordNet
noun
A belief in and reverence for devils (especially Satan) [syn: diabolism, demonism, Satanism]

Definition of 'Demonism'

From: GCIDE
  • Demonism \De"mon*ism\, n. [Cf. F. d['e]monisme.] The belief in demons or false gods. [1913 Webster]
  • The established theology of the heathen world . . . rested upon the basis of demonism. --Farmer. [1913 Webster]

Synonyms of 'demonism'

From: Moby Thesaurus