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Definition unstable in British English

unstable adjective

adjective
/ʌnˈsteɪb(ə)l/
1

an unstable person becomes angry or upset often and very suddenly

Example

My father wasn't a bad man, but he was emotionally unstable.

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2

an unstable government changes often and must deal with a lot of fighting and protests

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3

an unstable system, situation, or relationship often has serious problems

Example

an unstable economy

4

an unstable substance reacts very easily with other chemical substances and can be dangerous

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6

an unstable object is likely to move or change because of the forces affecting it

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Definition unstable in British English