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Dictionary definition for: Unstable

1. (a) lacking stability or fixity or firmness; "unstable political conditions" "the tower proved to be unstable in the high wind" "an unstable world economy"

2. (s) highly or violently reactive; "sensitive and highly unstable compounds"

3. (s) affording no ease or reassurance; "a precarious truce"

4. (s) suffering from severe mental illness; "of unsound mind"

5. (s) disposed to psychological variability; "his rather unstable religious convictions"

6. (s) subject to change; variable; "a fluid situation fraught with uncertainty" "everything was unstable following the coup"

WordNet 2.1 Copyright Princeton University. All rights reserved.