- (n.) State of being external; exteriority.
- (n.) separation from the perceiving mind.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). externality. Retrieved September 20, 2026, from http://smartdefine.org/externality/definitions/2006364 |
| Chicago | Webster's. 2011. "externality" http://smartdefine.org/externality/definitions/2006364 (accessed September 20, 2026). |
| Harvard | Webster's 2011, externality, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/externality/definitions/2006364>. |
| MLA | Webster's. "externality" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/externality/definitions/2006364> |