- 1the quality of a situation in which things are likely to change or fail suddenly political and economic instability
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- 2a mental condition in which someone's behavior is likely to change suddenly mental/emotional instability opposite stability see unstable
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NAmE//ˌɪnstəˈbɪlət̮i//
[uncountable, countable, usually plural] (pl. instabilities)Check pronunciation: instability