Definition of demoniast in English:

demoniast

noun

rare
  • A person who worships or believes in demons; = demonist.

Origin

Early 18th century; earliest use found in Daniel Defoe (?1660–1731), writer and businessman. Probably an alteration of demonist after agent nouns ending in -ast, e.g. enthusiast.

Pronunciation

demoniast

/dɪˈməʊnɪast/