Definition: subject to change; variable
Usage: a fluid situation fraught with uncertainty; everything was unstable following the coup
Main entry: unstable, precarious
Definition: affording no ease or reassurance
Usage: a precarious truce
Main entry: unstable
Definition: highly or violently reactive
Usage: sensitive and highly unstable compounds
Main entry: unstable
Definition: disposed to psychological variability
Usage: his rather unstable religious convictions
Main entry: mentally ill, unsound, unstable
Definition: suffering from severe mental illness
Usage: of unsound mind
Main entry: unstable
Definition: lacking stability or fixity or firmness
Usage: unstable political conditions; the tower proved to be unstable in the high wind; an unstable world economy