Definitions

1. noun

a person who smokes, especially a chain smoker, or a person who uses a smoke-producing device, such as a pipe or cigar.

“The fumer in the corner of the room was a heavy smoker.”

2. verb

to smoke (cigarettes, cigars, etc.), to use a smoke-producing device, or to produce smoke (in a chimney, etc.).

“The fire was causing the house to fume with smoke.”

3. verb (obsolete)

to emit a strong, unpleasant smell.

“The old house was said to fume with the stench of rotting food.”