Learn the meaning and usage of the word volatile , which can be an adjective or a noun. Find out its origin, synonyms, example sentences, and related phrases and articles. What is the difference between Volatile and Nonvolatile Substances ? Volatile substances easily transfer into gaseous phase, but nonvolatile.. volatile (comparative more volatile , superlative most volatile ) (physics) Evaporating or vaporizing readily under normal conditions. (of a substance, informal) Explosive. (of a price, etc.) Variable or erratic. quotations What Does " Volatile " Really Mean? — A Deep Dive The word “ volatile ” is a fascinating term packed with layers of meaning. It’s often used to describe something that’s changeable, unpredictable, or unstable. But, as with many words, its exact connotation depends on the context. Definition of " Volatile " Let’s break down the core meanings of " volatile " using a simple definition list: