- (intransitive, euphemistic, Britain) To pass gas; to break wind.
- (transitive) To vent, usually, to reduce pressure in a container.
- The radioactivity was released when they blew off steam from the containment vessel.
- (intransitive) To let steam escape through a passage provided for the purpose.
- The engine or steamer is blowing off.
- (idiomatic) to shirk or disregard (a duty or person).
- I decided to blow off the meeting and leave early.
- We've both been blowing off Peter all day: he's really boring.
- (transitive) To forcibly disconnect something by use of a firearm or explosive device.
- Her leg was blown off by a landmine.