- (a.) Common to or affecting at the same time, a large number in a community; -- applied to a disease which, spreading widely, attacks many persons at the same time; as, an epidemic disease; an epidemic catarrh, fever, etc. See Endemic.
- (a.) Spreading widely or generally prevailing; affecting great numbers, as an epidemic does; as, epidemic rage; an epidemic evil.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). epidemical. Retrieved September 21, 2026, from http://smartdefine.org/epidemical/definitions/2004098 |
| Chicago | Webster's. 2011. "epidemical" http://smartdefine.org/epidemical/definitions/2004098 (accessed September 21, 2026). |
| Harvard | Webster's 2011, epidemical, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/epidemical/definitions/2004098>. |
| MLA | Webster's. "epidemical" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/epidemical/definitions/2004098> |