+An **unstable state** describes a system poised at a point where any small disturbance will cause it to move away from its current configuration, rather than return to it. Unlike a state of [Equilibrium](/wiki/equilibrium), an unstable system lacks inherent [Stability](/wiki/stability), leading to rapid, often irreversible, change.
+## See also
+- [Metastability](/wiki/metastability)
+- [Critical Point](/wiki/critical_point)
+- [Phase Transition](/wiki/phase_transition)
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