1.
A situation that is ~ is likely to change suddenly and unexpectedly.
The international oil markets have been highly ~ since the early 1970s...
= unstable
ADJ
volatility
He is keen to see a general reduction in arms sales given the volatility of the region.
= instability
N-UNCOUNT
2.
If someone is ~, their mood often changes quickly.
He has a ~ temper.
ADJ
3.
A ~ liquid or substance is one that will quickly change into a gas. (TECHNICAL)
It’s thought that the blast occurred when ~ chemicals exploded.
ADJ