unstable Syllabification: (un·sta·ble)Pronunciation: /ˌənˈstābəl/Translate unstable | into French | into German | into Italian | into Spanish Definition of unstable adjective (unstabler, unstablest) prone to change, fail, or give way; not stable:the unstable cliff tops an unstable government prone to psychiatric problems or sudden changes of mood:he was mentally unstableDerivatives unstableness noun unstablyPronunciation: /-blē/ adverb unstable in other Oxford dictionaries Definition of unstable in the British & World English dictionary
