Fume/fjuːm/ Definition 1 of 4Pro Tip 1/3Negative Connotation When 'fume' describes smoke or gas, it often implies something harmful or unpleasant. I couldn't breathe due to the toxic fumes from the fire. Pro Tip 2/3Environmental Context Often used in discussions about pollution or environmental issues. Activists protested against the harmful fumes affecting the local wildlife. Pro Tip 3/3Visual Imagery The word can create a strong image of visible vapors escaping from a source. As the volcano erupted, it spewed fumes into the sky.