definition of
volatile

[1] #1 volatile a. evaporating readily at normal temperatures and pressures; "volatile oils"; "volatile solvents". wn

[2] #2 volatile n. a volatile substance; a substance that changes readily from solid or liquid to a vapor; "it was heated to evaporate the volatiles". wn

[3] #3 volatile s. [explosive] liable to lead to sudden change or violence; "an explosive issue"; "a volatile situation with troops and rioters eager for a confrontation". wn

[4] #4 volatile s. [fickle] marked by erratic changeableness in affections or attachments; "fickle friends"; "a flirt's volatile affections". wn

[5] #5 volatile s. tending to vary often or widely; "volatile stocks"; "volatile emotions". wn