chimney

noun (plural chimneys)

• 1a vertical channel or pipe which conducts smoke and combustion gases up from a fire or furnace and typically through the roof of a building: a coal fire thrust yellow flames up the chimney a factory chimney
• a chimney stack: the outlines of rooftops and chimneys stood out against the pale sky

• 2a glass tube protecting the flame of a lamp: he trimmed the wick and put the glass chimney over the flame

• 3a very steep narrow cleft by which a rock face may be climbed: he slid fifty feet down a chimney, and became wedged there