- (a.) Influenced or produced by a demon or evil spirit; as, demoniac or demoniacal power.
- (a.) Pertaining to or characteristic of, a demon or evil spirit; devilish; as, a demoniac being; demoniacal practices.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). demoniacal. Retrieved September 26, 2026, from http://smartdefine.org/demoniacal/definitions/1995911 |
| Chicago | Webster's. 2011. "demoniacal" http://smartdefine.org/demoniacal/definitions/1995911 (accessed September 26, 2026). |
| Harvard | Webster's 2011, demoniacal, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/demoniacal/definitions/1995911>. |
| MLA | Webster's. "demoniacal" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/demoniacal/definitions/1995911> |