Volatile means something changing or changeable. It can refer to:In general: Volatility, a measure of instabilityIn economics: Volatility , a measure of the risk in a financial instrumentIn chemistry: Volatility , a measure of the tendency of a substance to vaporize. It has also been defined as a measure of how readily a substance vaporizes. Volatiles, a group of compounds with low boiling points that are associated with a planet's or moon's