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- DictionaryUn·sta·ble/ˌənˈstāb(ə)l/
adjective
- 1. likely to give way; not stable: "the unstable cliff tops"
To be unstable is to lack stability, meaning things could change without warning, like an unstable bookshelf that is likely to fall down. If you are unstable emotionally, you might be ecstatically happy one minute and horribly depressed and angry the next.
2 days ago · If people are unstable, their emotions and behaviour keep changing because their minds are disturbed or upset. He was emotionally unstable. Coleridge was also a highly unstable person.
Definition of unstable adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
1. a. Tending strongly to change: unstable weather. b. Not constant; fluctuating: unstable vital signs. 2. a. Wavering or fickle: At first, he was unstable in his decisions. b. Showing or marked by erratic or volatile emotions or behavior. 3. Not firmly placed; unsteady: an unstable ladder. 4. Chemistry. a. Decomposing readily. b.
likely to change or end suddenly: an unstable situation. an unstable economy. unstable adjective (PERSON) If someone is unstable, their moods and behaviour change suddenly, especially because they are mentally ill. unstable adjective (MOVE) not fixed or safe and likely to move: That chair looks a bit unstable.
How to use . unstable in a sentenceMost of the think tanks thought that the situation in eastern regions of Ukraine would remain unstable for a long time.
Not constant; fluctuating. Unstable vital signs. American Heritage. Similar definitions. Wavering or fickle. At first, he was unstable in his decisions. American Heritage. Similar definitions. Showing or marked by erratic or volatile emotions or behavior. American Heritage. More Adjective Definitions (6) Synonyms: wobbly. unsteady. tottery.
