- (n.) An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism, regarded as subtile fluids destitute of weight but in modern science little used.
- (a.) Not ponderable; without sensible or appreciable weight; incapable of being weighed.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). imponderable. Retrieved September 21, 2026, from http://smartdefine.org/imponderable/definitions/2019687 |
| Chicago | Webster's. 2011. "imponderable" http://smartdefine.org/imponderable/definitions/2019687 (accessed September 21, 2026). |
| Harvard | Webster's 2011, imponderable, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/imponderable/definitions/2019687>. |
| MLA | Webster's. "imponderable" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/imponderable/definitions/2019687> |