[n] a volatile substance; a substance that changes readily from solid or liquid to a vapor; "it was heated to evaporate the volatiles"
[adj] tending to vary often or widely; "volatile stocks"; "volatile emotions"
[adj] marked by erratic changeableness in affections or attachments; "fickle friends"; "a flirt's volatile affections"
[adj] liable to lead to sudden change or violence; "an explosive issue"; "a volatile situation with troops and rioters eager for a confrontation"
[adj] (chemistry) evaporating readily at normal temperatures and pressures; "volatile oils"; "volatile solvents"