evaporating rapidly; passing off readily in the form of vapor

Acetone is a volatile solvent.

tending or threatening to break out into open violence; explosive

a volatile political situation.

changeable; mercurial; flighty

a volatile disposition.

(of prices, values, etc.) tending to fluctuate sharply and regularly

volatile market conditions.

fleeting; transient

volatile beauty.

Computers . of or pertaining to storage that does not retain data when electrical power is turned off or fails.

able to fly or flying.

a volatile substance, as a gas or solvent.

adjective

calm , firm , stable , steadfast

adjective

airy , buoyant , capricious , effervescent , elastic , elusive , ephemeral , erratic , expansive , fickle , fleeting , flighty , flippant , frivolous , fugacious , fugitive , gaseous , gay , giddy , impermanent , imponderable , inconsistent , inconstant , light , lively , lubricious , mercurial , momentary , playful , resilient , short-lived , sprightly , subtle , temperamental , ticklish , transient , transitory , unsettled , unstable , unsteady , up-and-down , vaporous , variable , whimsical , changeable , fantastic , fantastical , freakish , uncertain , unpredictable , eruptive , excitable , explosive , flying , lighthearted , moody , rash , volant