: an enclosed passageway for directing a current: such 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
Examples of flue in a Sentence
Recent Examples on the Web
Firs, pines, and spruces have a high sap content that can damage your chimney flue and produce a lot of creosote on your chimney walls.
—
Sheryl Geerts, Better Homes & Gardens, 17 Dec. 2024
Worn or poorly adjusted and maintained combustion devices (e.g., boilers, furnaces) can be significant sources, or if the flue is improperly sized, blocked, disconnected, or is leaking.
—Marley Malenfant, Austin American-Statesman, 11 June 2024
Catch up quick: Capturing the carbon from the flues of plants, like gas, coal and ethanol, and storing it underground (called CCS) has long been technically but not economically feasible, and in development.
—Katie Fehrenbacher, Axios, 6 Sep. 2024
The dog owner told GMA her apartment's leak was caused by a bird's nest sitting in the flue of her building's gas water heater.
—Brenton Blanchet, Peoplemag, 12 July 2024
See all Example Sentences for flue 
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Sheryl Geerts, Better Homes & Gardens, 17 Dec. 2024
Worn or poorly adjusted and maintained combustion devices (e.g., boilers, furnaces) can be significant sources, or if the flue is improperly sized, blocked, disconnected, or is leaking.
—Marley Malenfant, Austin American-Statesman, 11 June 2024
Catch up quick: Capturing the carbon from the flues of plants, like gas, coal and ethanol, and storing it underground (called CCS) has long been technically but not economically feasible, and in development.
—Katie Fehrenbacher, Axios, 6 Sep. 2024
The dog owner told GMA her apartment's leak was caused by a bird's nest sitting in the flue of her building's gas water heater.
—Brenton Blanchet, Peoplemag, 12 July 2024
See all Example Sentences for flue
Dictionary Entries Near flue
Cite this Entry
“Flue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flue. Accessed 30 Dec. 2024.
Copy CitationKids Definition
flue
noun
: an enclosed passageway for directing a current
especially
: a channel in a chimney for carrying flame and smoke to the outer air
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