English edit

Etymology edit

From demonian +‎ -ism.

Pronunciation edit

Noun edit

demonianism (uncountable)

  1. (now rare) Possession by a demon or demons.
    • 1971, Keith Thomas, Religion and the Decline of Magic, Folio Society, published 2012, page 458:
      Strictly speaking, the belief in demonianism was distinct from that in witchcraft.