—n. 1. Often, fumes. any smokelike or vaporous exhalation from matter or substances, esp. of an odorous or harmful nature: tobacco fumes; noxious fumes of carbon monoxide. 2. an irritable or angry mood: He has been in a fume ever since the contract fell through.
—v.t. 1. to emit or exhale, as fumes or vapor: giant stacks fuming their sooty smoke. 2. to treat with or expose to fumes.
3. to show fretful irritation or anger: She always fumes when the mail is late.
—v.i. 1. to rise, or pass off, as fumes: smoke fuming from an ashtray. 2. to emit fumes: The leaky pipe fumed alarmingly.