Meaning of FLUE in English

FLUE

[flue] n [origin unknown] (1582): an enclosed passageway for directing a current: as a: a channel in a chimney for conveying flame and smoke to the outer air b: a pipe for conveying flame and hot gases around or through water in a steam boiler c: an air channel leading to the lip of a wind instrument d: flue pipe

Merriam-Webster English vocab.      Английский словарь Merriam Webster.