- (n.) The quality or condition of being unstable; want of stability, firmness or steadiness; liability to give way or to fail; insecurity; precariousness; as, the instability of a building.
- (n.) Lack of determination of fixedness; inconstancy; fickleness; mutability; changeableness; as, instability of character, temper, custom, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). instability. Retrieved September 21, 2026, from http://smartdefine.org/instability/definitions/2022261 |
| Chicago | Webster's. 2011. "instability" http://smartdefine.org/instability/definitions/2022261 (accessed September 21, 2026). |
| Harvard | Webster's 2011, instability, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/instability/definitions/2022261>. |
| MLA | Webster's. "instability" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/instability/definitions/2022261> |