Unstable meaning

ŭn-stābəl
Frequency:
The definition of unstable is something that is prone to changing often, or a person with wild mood swings.

When the weather changes from freezing to hot to freezing rapidly and without reason, this is an example of a time when it is unstable.

When a person has a bad temper that can explode or flare up with no provocation at all, this is an example of a person who would be described as unstable.

adjective
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Not firmly placed; unsteady.

An unstable ladder.

adjective
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Liable to undergo spontaneous decay into some other form. For example, the nucleus of uranium 238 atom is unstable and changes by radioactive decay into the nucleus of thorium 234, a lighter element. Many subatomic particles, such as muons and neutrons, are unstable and decay quickly into other particles.
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Not stable.
  • Not fixed, firm, or steady; easily upset or unbalanced.
  • Changeable; variable; fluctuating.
  • Unreliable; fickle.
  • Emotionally or psychologically unsettled.
  • Tending to decompose or change into other compounds.
adjective
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Relating to a chemical compound that readily decomposes or changes into other compounds or into elements.
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Relating to an atom or chemical element that is likely to share electrons; reactive.
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Characterized by uncertain or inadequate response to treatment and the potential for unfavorable outcome, as the status of a medical condition or disease.
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Having a strong tendency to change.
adjective
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adjective
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adjective
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(chemistry) Readily decomposable.
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(physics) Radioactive, especially with a short half-life.
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Origin of unstable

  • un- +"Ž stable

    From Wiktionary