- (adv.) Wicked in the extreme; abominable; iniquitous; atrociously villainous; execrable; detestably vile.
- (adv.) Wicked in the extreme; abominable; iniquitous; atrociously villainous; execrable; detestably vile.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). nefarious. Retrieved September 22, 2026, from http://smartdefine.org/nefarious/definitions/2036227 |
| Chicago | Webster's. 2011. "nefarious" http://smartdefine.org/nefarious/definitions/2036227 (accessed September 22, 2026). |
| Harvard | Webster's 2011, nefarious, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/nefarious/definitions/2036227>. |
| MLA | Webster's. "nefarious" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/nefarious/definitions/2036227> |