unstable
Pronunciation
/ənˈsteɪbəɫ/

Definition & Meaning of "unstable"in English

unstable
01

displaying unpredictable and sudden changes in emotions and behavior

unstable definition and meaning
Examples
His relationships were strained due to his unpredictable and unstable behavior.
02

not firmly fixed or steady

unstable definition and meaning
Examples
The unstable bridge swayed dangerously in the wind, making it unsafe to cross.
Grammatical Information
Composition
Compound
qualitative
Superlative
most unstable
Comparative
more unstable
gradable
Examples
The unstable weather conditions made it difficult to predict the storm ’s path.
04

(of a substance) chemically reactive or prone to rapid change when exposed to other substances

Examples
The compound is highly unstable and must be handled with care.
05

prone to change or failure

Examples
The stock market has been particularly unstable lately, with frequent fluctuations in value.
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