volatile Bedeutung, Definition volatile: likely to change suddenly and unexpectedly or suddenly become violent or angry. Volatile Definition. In chemistry, the word volatile refers to a substance that vaporizes readily. Volatility is a measure of how readily a substance. This man looks like a very volatile person. Licensed from iStockPhoto. adjective. The definition of volatile is tending to become violent or something that is rapidly. What is the origin of 'sleep tight'? Words used to describe properties of substances: Energy Policy Into the 21st Century Will Marshall March 31, Computer Science computing of a memory not retaining stored information when the power supply is cut off. Don't Blame Millennials for the Introductory 'Which' Which, history. Contribute to our Open Dictionary. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.