Dictionary definition · volatile
noun
- a volatile substance; a substance that changes readily from solid or liquid to a vapor"it was heated to evaporate the volatiles"
adjective
- evaporating readily at normal temperatures and pressures"volatile oils"
- liable to lead to sudden change or violence"an explosive issue"
- marked by erratic changeableness in affections or attachments"fickle friends"
- tending to vary often or widely"volatile stocks"
Source: Open English WordNet (CC BY 4.0).