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English definition of “volatile”

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volatile

adjective  /ˈvɑl·ə·t̬əl/ us  
likely to change suddenly and unexpectedly, or suddenly violent or angry: It was a volatile situation, and the police handled it well. The stock market was highly volatile in the early part of the year. chemistry If a substance, esp. a liquid, is volatile, it will change easily into a gas: volatile chemicals
volatility
noun [U]  /ˌvɑl·əˈtɪl·ɪ·t̬i/ us  
Volatility in wheat on Wednesday resulted in a single-day trading record in Kansas City.
(Definition of volatile from the Cambridge Academic Content Dictionary © Cambridge University Press)
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