n. The character of being volatile or of having the power of flight.n. The state or property of being volatile; disposition to exhale or evaporate; that property of a substance which disposes it to become more or less freely or rapidly diffused and wasted in the atmosphere; capability of evaporating, or being dissipated at ordinary atmospheric temperatures: as, the volatility of ether, alcohol, ammonia, or the essential oils.n. The character of being volatile; frivolous, flighty, or giddy behavior; mutability of mind; levity; flightiness; fickleness: as, the volatility of youth.n. Synonyms Lightness, Frivolity, etc. (see levity), instability, giddiness.