volatile (Adjective) — (chemistry) evaporating readily at normal temperatures and pressures. ex. "volatile oils" ex. "volatile solvents"
volatile (Adjective) — Liable to lead to sudden change or violence. ex. "a volatile situation with troops and rioters eager for a confrontation"
volatile (Adjective) — Marked by erratic changeableness in affections or attachments. ex. "a flirt's volatile affections"
volatile (Adjective) — Tending to vary often or widely. ex. "volatile stocks" ex. "volatile emotions"
volatile (Noun) — A volatile substance; a substance that changes readily from solid or liquid to a vapour. ex. "it was heated to evaporate the volatiles"