Definition of Instability

Noun: instability  ,in-stu'bi-li-tee

1. The state or quality of being politically unstable
    
2. Unreliability attributable to being unstable
    
3. A lack of balance or state of disequilibrium
   "a hormonal instability";
   - imbalance, unbalance
    
4. The quality or attribute of being unstable and irresolute
   - unstableness

See also:
instabilities
instable