definition of
volatility

[1] #1 volatility n. the property of changing readily from a solid or liquid to a vapor. wn

[2] #2 volatility n. [unpredictability] the trait of being unpredictably irresolute; "the volatility of the market drove many investors away". wn

[3] #3 volatility n. [excitability, excitableness] being easily excited. wn