- (n.) An instrument for determining the extent and shape of the field of vision.
- (n.) The outer boundary of a body or figure or the sum of all the sides.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). perimeter. Retrieved September 22, 2026, from http://smartdefine.org/perimeter/definitions/2043844 |
| Chicago | Webster's. 2011. "perimeter" http://smartdefine.org/perimeter/definitions/2043844 (accessed September 22, 2026). |
| Harvard | Webster's 2011, perimeter, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/perimeter/definitions/2043844>. |
| MLA | Webster's. "perimeter" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/perimeter/definitions/2043844> |