boil off (third-person singular simple present boils off, present participle boiling off, simple past and past participle boiled off)
- (transitive) to remove by boiling
- cooking it will boil off the vodka.
- (intransitive) to be removes by boiling
- Some of the salt will rise up with the vapors, but most of it will be left in the pan when the water has boiled off.