diabolism

noun

1. Theology.
   1. action aided or caused by the devil; sorcery; witchcraft.
   2. the character or condition of a devil.
   3. a doctrine concerning devils.
   4. a belief in or worship of devils.
2. action befitting the devil; deviltry.

noun

1. 1. activities designed to enlist the aid of devils, esp in witchcraft or sorcery
   2. worship of devils or beliefs and teachings concerning them
   3. the nature of devils
2. character or conduct that is devilish or fiendish; devilry