A fume is a bad smell or odor that's unpleasant and annoying.
When people talk about fumes, they usually mean strong smells that are coming from something like gasoline, paint, or even chemicals. You might hear someone say "I'm getting fumes from this car" meaning the engine is leaking gas, or "Don't breathe in too deep, these fumes from the paint can be bad for you". The word "fume" can also mean a stream of something like smoke or vapor rising up into the air. For example, if you see a factory chimney spewing out fumes high above the city, it's not just a pretty sight – it's usually an indication of pollution.
A gas or vapour/vapor that is strong-smelling or dangerous to inhale.
Example: Don't stand around in there breathing the fumes while the adhesive cures.
To expose (something) to fumes; specifically, to expose wood, etc., to ammonia in order to produce dark tints.
