demoniac Meaning, Definition & Usage

  1. noun someone who acts as if possessed by a demon
  2. adjective satellite frenzied as if possessed by a demon
    amok; possessed; amuck; berserk; demoniacal.
    • the soldier was completely amuck
    • berserk with grief
    • a berserk worker smashing windows

WordNet

De*mo"ni*ac, Dem`o*ni"a*cal adjective (Also<
  • Demoniac
  • Demoniacal
)
Etymology
L. daemoniacus, fr. daemon; cf. F. démoniaque. See Demon.
Definitions
  1. Pertaining to, or characteristic of, a demon or evil spirit; devilish; as, a demoniac being; demoniacal practices.
    Sarcastic, demoniacal laughter. Thackeray.
  2. Influenced or produced by a demon or evil spirit; as, demoniac or demoniacal power. "Demoniac frenzy." Milton.
De*mo"ni*ac noun
Definitions
  1. A human being possessed by a demon or evil spirit; one whose faculties are directly controlled by a demon.
    The demoniac in the gospel was sometimes cast into the fire. Bates.
  2. (Eccl. Hist.) One of a sect of Anabaptists who maintain that the demons or devils will finally be saved.

Webster 1913