(a.) Pertaining to the devil; resembling or appropriate or appropriate to, the devil; devilish; infernal; impious; atrocious; nefarious; outrageously wicked; as, a diabolic or diabolical temper or act.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). diabolical. Retrieved September 25, 2026, from http://smartdefine.org/diabolical/definitions/1997127 |
| Chicago | Webster's. 2011. "diabolical" http://smartdefine.org/diabolical/definitions/1997127 (accessed September 25, 2026). |
| Harvard | Webster's 2011, diabolical, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/diabolical/definitions/1997127>. |
| MLA | Webster's. "diabolical" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/diabolical/definitions/1997127> |