—adj.
1 evaporating rapidly (volatile salts).
2 changeable, fickle.
3 lively, light-hearted.
4 apt to break out into violence.
5 transient.
—n. a volatile substance.
Phrases and idioms:
volatile oil = essential oil.
Derivatives:
volatileness n. volatility n.
Etymology: OF volatil or L volatilis f. volare volat- fly
Useful english dictionary. 2012.