demonism Meaning, Definition & Usage

  1. noun a belief in and reverence for devils (especially Satan)
    diabolism; Satanism.

WordNet

De"mon*ism noun
Etymology
Cf. F. démonisme.
Definitions
  1. The belief in demons or false gods.
    The established theology of the heathen world . . . rested upon the basis of demonism. Farmer.

Webster 1913