(a.) Not perceptible; not to be apprehended or cognized by the souses; not discernible by the mind; not easily apprehended.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). imperceptible. Retrieved September 26, 2026, from http://smartdefine.org/imperceptible/definitions/2019509 |
| Chicago | Webster's. 2011. "imperceptible" http://smartdefine.org/imperceptible/definitions/2019509 (accessed September 26, 2026). |
| Harvard | Webster's 2011, imperceptible, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/imperceptible/definitions/2019509>. |
| MLA | Webster's. "imperceptible" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/imperceptible/definitions/2019509> |