unstable - Dictionary definition and pronunciation - Yahoo! Education

Definition of unstable

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un·sta·ble  audio  (n-stbl) KEY 

ADJECTIVE:
un·sta·bler, un·sta·blest
    1. Tending strongly to change: unstable weather.
    2. Not constant; fluctuating: unstable vital signs.
    1. Fickle.
    2. Lacking control of one's emotions; marked by unpredictable behavior.
  3. Not firmly placed; unsteady: an unstable ladder.
  4. Chemistry
    1. Decomposing readily.
    2. Highly or violently reactive.
  5. Physics
    1. Decaying with relatively short lifetime. Used of subatomic particles.
    2. Radioactive.


OTHER FORMS:
un·stable·ness(Noun), un·stably(Adverb)


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