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1. Dictionary

   un·sta·ble

   /ˌənˈstāb(ə)l/

   adjective

   • 1. likely to give way; not stable: "the unstable cliff tops" Similar unsteadyrockywobblywobblingricketyshakytotterytotteringteeteringdodderyunsafeunbalancedunreliableinsecurenot secureunfastenedunsecuredmovableprecariousbocketyOpposite stablesteady
   • ▪ likely to change or fail; not firmly established: "some students found themselves in unstable housing situations" Similar changeablevolatilevariableunsettledfluctuatinginconstantinconsistentirregularfitfulunpredictableunreliableficklecapriciousmercurialerraticuncertainwaveringinformal:peakyOpposite stablefirm
   • ▪ prone to psychiatric problems or sudden changes of mood: "he was mentally unstable" Similar unbalancedof unsound mindmentally illderangeddementedcrazeddistractedtroubleddisturbedunhingedinsanemadmad as a hattermad as a March hareraving madlunaticout of one's mind/headnot in one's right mindneuroticpsychoticnon compos mentissectionableinformal:crazyloopyloonymixed upnutsnuttynutty as a fruitcakebananascrackedcrackpotdippyscrewybatscuckoobonkersmentalscrewed upnot all thereoff one's headout to luncha bit lackingaround the benddaftbarmycrackersbarkingbarking madbattydottypottyoff one's trolley/rockerdaft as a brushnot the full shillinground the twistaway with the fairiesnutsynutsosquirrellywackobuggydated:touchedOpposite stablebalanced

   Derivatives

   • 1. unstableness noun
   • 2. unstably adverb

   Scrabble Points: 10

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2. dictionary.cambridge.org › dictionary › englishMeaning of unstable in English - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   UNSTABLE definition: 1. not solid and firm and therefore not strong, safe, or likely to last: 2. An unstable person…. Learn more.

3. www.merriam-webster.com › dictionary › unstableUnstable Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › unstable

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   The meaning of UNSTABLE is not stable : not firm or fixed : not constant. How to use unstable in a sentence. Synonym Discussion of Unstable.

4. www.vocabulary.com › dictionary › unstableUnstable - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › unstable

   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.

5. www.dictionary.com › browse › unstableUNSTABLE Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › unstable

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   adjective. not stable; not firm or firmly fixed; unsteady. liable to fall or sway. Synonyms: precarious. unsteadfast; inconstant; wavering: unstable convictions. Synonyms: vacillating. marked by emotional instability: an unstable person. irregular in movement: an unstable heartbeat.

6. www.thefreedictionary.com › unstableUnstable - definition of unstable by The Free Dictionary

   www.thefreedictionary.com › unstable

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   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.

7. www.collinsdictionary.com › us › dictionaryUNSTABLE definition in American English | Collins English...

   www.collinsdictionary.com › us › dictionary

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   1. adjective. You can describe something as unstable if it is likely to change suddenly, especially if this creates difficulty or danger. The situation is unstable and potentially dangerous. Synonyms: changeable, volatile, unpredictable, variable More Synonyms of unstable. 2. adjective. Unstable objects are likely to move or fall.

8. www.oxfordlearnersdictionaries.com › english › unstableunstable adjective - Definition, pictures, pronunciation and...

   www.oxfordlearnersdictionaries.com › english › unstable

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   (specialist) (of a substance) not staying in the same chemical or atomic state. Check pronunciation: unstable. Definition of unstable adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.