Overview of noun demoniac

The noun demoniac has 1 sense

• demoniac -- (someone who acts as if possessed by a demon)

Overview of adj demoniac

The adj demoniac has 1 sense

• amuck, amok, berserk, demoniac, demoniacal, possessed -- (frenzied as if possessed by a demon; "the soldier was completely amuck"; "berserk with grief"; "a berserk worker smashing windows")