The meaning of INSTABILITY is the quality or state of being unstable; especially : lack of emotional or mental stability. How to use instability in a sentence.

Atmospheric instability is a major component of all weather systems on Earth. In the theory of dynamical systems, a state variable in a system is said to be unstable if it evolves without bounds. A system …

INSTABILITY definition: 1. uncertainty caused by the possibility of a sudden change in the present situation: 2…. Learn more.

Definition of instability noun from the Oxford Advanced Learner's Dictionary. the quality or state of being likely to change or fail suddenly. Questions about grammar and vocabulary? Find the answers with …

in•sta•bil•i•ty (ˌɪn stəˈbɪl ɪ ti) n. 1. the quality or state of being unstable; lack of stability. 2. the tendency to behave in an unpredictable or erratic manner: emotional instability.

Instability is the quality of being unstable. ...unpopular policies, which resulted in social discontent and political instability. ...Caligula's inherent mental instability. The length of the fuselage was increased …

Instability definition: The quality or condition of being unstable.

Dec 14, 2025 · (uncountable) The quality of being unstable. (physics, countable) A state that is not in equilibrium, or in which a small change has a large irreversible effect.

INSTABILITY definition: the quality or state of being unstable; lack of stability or firmness. See examples of instability used in a sentence.

4 days ago · That instability, rather than a clear recessionary or boom-time signal, is a defining feature of the current cycle.