chimney /ˈt͡ʃɪmni/noun 6verb 1forms 4phrases 1 noun6 •A vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon- or hydrocarbon-based fuels); a flue.Our chimney was a square hole in the roof: it was but a little part of the smoke that found its way out, and the rest eddied about the house, and kept us coughing and piping the eye. — 1881 •The glass flue surrounding the flame of an oil lamp. •(UK) The smokestack of a steam locomotive. •A narrow cleft in a rock face; a narrow vertical cave passage. •(vulgar, euphemistic) A vagina. •(Northern-Ireland, slang) A black eye; a shiner. verb1 •To negotiate a chimney (narrow vertical cave passage) by pushing against the sides with back, feet, hands, etc. formschimneyed · chimneying · chimneys · chimnies Phrases with chimney smoke like a chimneyTo smoke tobacco frequently.