English Dictionary
Definition unstable in British English
unstable adjective
adjective
/ʌnˈsteɪb(ə)l/
Example
My father wasn't a bad man, but he was emotionally unstable.
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3
an unstable system, situation, or relationship often has serious problems
Example
an unstable economy
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5
relating to a radioactive substance whose nucleus breaks down to release radioactivity
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