noun \ˈflü\

: a channel or pipe in a chimney for carrying flame and smoke to the outer air

Full Definition of FLUE

:  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

Origin of FLUE

origin unknown
First Known Use: 1582


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