Instability(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.
Instability(n.)
- Lack of determination of fixedness; inconstancy; fickleness; mutability; changeableness; as, instability of character, temper, custom, etc.
Instable(a.)
- Not stable; not standing fast or firm; unstable; prone to change or recede from a purpose; mutable; inconstant.