Volatility
Volatility or volatile may refer to:

Chemistry
Volatility (chemistry), a measuring tendency of a substance or liquid to vaporize easily
Relative volatility, a measure of vapor pressures of the components in a liquid mixture
Volatile (astrogeology), a group of compounds with low boiling points that are associated with a planet's or moon's crust and atmosphere
Volatile organic compounds, organic or carbon compounds that can evaporate at normal temperature and pressure
Volatile anaesthetics, a class of anaesthetics which evaporate or vaporize easily
Volatile substance abuse, the abuse of household inhalants containing volatile compounds
Volatile oil, also known as essential oil, an oil derived from plants with aromatic compounds used in cosmetic and flavoring industries
Volatile acid/Volatile acidity, a term used inconsisitenly across the fields of winemaking, wastewater treatment, physiology, and other fields

Computer science
Volatile variables, variables that can be changed by an external process
Volatile memory, memory that lasts only while the power is on (and thus would be lost after a restart)
Volatility (memory forensics), an open source memory forensics tool

Other uses
Volatility (finance), a measure of the risk in a financial instrument
Volatiles, the volatile compounds of magma (mostly water vapor) that affect the appearance and strength of volcanoes
Stochastic volatility, in the mathematical theory of probability
Pedersen index, a measure of electoral volatility in political party systems
One of the components of the set of phenomena known as volatility, uncertainty, complexity and ambiguity
Volatile Games, a video games maker
Volatile (A Hero A Fake album), 2008
Volatile (The Lime Spiders album), 1988