- (n.) An offense against Christianity, consisting in a denial of some essential doctrine, which denial is publicly avowed, and obstinately maintained.
- (n.) An opinion held in opposition to the established or commonly received doctrine, and tending to promote a division or party, as in politics, literature, philosophy, etc.; -- usually, but not necessarily, said in reproach.
- (n.) Religious opinion opposed to the authorized doctrinal standards of any particular church, especially when tending to promote schism or separation; lack of orthodox or sound belief; rejection of or erroneous belief in regard to, some fundamental religious doctrine or truth; heterodoxy.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). heresy. Retrieved September 20, 2026, from http://smartdefine.org/heresy/definitions/2016143 |
| Chicago | Webster's. 2011. "heresy" http://smartdefine.org/heresy/definitions/2016143 (accessed September 20, 2026). |
| Harvard | Webster's 2011, heresy, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/heresy/definitions/2016143>. |
| MLA | Webster's. "heresy" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/heresy/definitions/2016143> |