What you mean by volatile?

Answer 1

1. Chemistry.
   1. Evaporating readily at normal temperatures and pressures.
   2. That can be readily vaporized.
2. 1. Tending to vary often or widely, as in price: the ups and downs of volatile stocks.
   2. Inconstant; fickle: a flirt's volatile affections.
   3. Lighthearted; flighty: in a volatile mood.
   4. Ephemeral; fleeting.
3. Tending to violence; explosive: a volatile situation with troops and rioters eager for a confrontation.
4. Flying or capable of flying; volant.