Definition of unstable

Definition of unstable
  1. unstable Adjective having a strong tendency to change
  2. unstable Adjective fluctuating; not constant
  3. unstable Adjective fickle
  4. unstable Adjective unpredictable
  5. unstable Adjective Readily decompasable
  6. unstable Adjective Radioactive, especially with a short half-life
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