- (a.) Not commensurable; having no common measure or standard of comparison; as, quantities are incommensurable when no third quantity can be found that is an aliquot part of both; the side and diagonal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable.
- (n.) One of two or more quantities which have no common measure.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). incommensurable. Retrieved September 22, 2026, from http://smartdefine.org/incommensurable/definitions/2020344 |
| Chicago | Webster's. 2011. "incommensurable" http://smartdefine.org/incommensurable/definitions/2020344 (accessed September 22, 2026). |
| Harvard | Webster's 2011, incommensurable, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/incommensurable/definitions/2020344>. |
| MLA | Webster's. "incommensurable" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/incommensurable/definitions/2020344> |