\ˈflü \

Definition of flue 

: 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 : flue pipe

Examples of flue in a Sentence

Recent Examples on the Web

Moisture in the wood cools the fire, obviously, resulting in an incomplete burn and more woodsmoke up the flue. Roy Berendson, Popular Mechanics, "The Ultimate Guide To Cutting and Splitting Firewood," 28 Sep. 2018 My favorite metaphor for Romy is Thoreau’s description of John Brown—a volcano with an ordinary chimney flue. Paul Devlin, WSJ, "‘An American Odyssey’ Review: Picturing the Blues," 30 Aug. 2018 If the heater burns gas or oil, the top should not be insulated, as the insulation could block the air that needs to reach the flue. Henry Gifford, Popular Mechanics, "Your House Is Bleeding You Dry. Here Are 9 Steps To Save You Money.," 8 Aug. 2018 Even the two large flues on the rooftop where the smoke and flame could have vented out were boarded shut. Francine Uenuma, Smithsonian, "The Iroquois Theater Disaster Killed Hundreds and Changed Fire Safety Forever," 12 June 2018 Get heat: Open the flue and build a nice big fire in the prepared fireplace. Debbi Snook, cleveland.com, "Michael Symon's Fireplace Chicken on a String (recipe)," 11 Apr. 2018 To claim a share of the $15m on offer, winners will have to turn carbon dioxide extracted from power-plant flues into something useful—and do so profitably. The Economist, "$15m is available to solve a burning problem," 9 Apr. 2018 Make sure there are no paper or other flammables near the fireplace, and always make sure that the flue is open before each use. Don Sorrell, Cincinnati.com, "Dried-out trees are a major safety hazard," 17 Dec. 2017 Inspect, clean and repair fireplace elements, including the chimney and flue, especially for wood-burning fireplaces. Pat Setter, sandiegouniontribune.com, "Quick fall home maintenance tasks now can prevent crises later," 14 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flue.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of flue

1582, in the meaning defined above

History and Etymology for flue

origin unknown

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Statistics for flue

Last Updated

1 Dec 2018

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Time Traveler for flue

The first known use of flue was in 1582

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More Definitions for flue



English Language Learners Definition of flue

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


\ˈflü \

Kids Definition of flue

: an enclosed passage for smoke or air

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More from Merriam-Webster on flue

Rhyming Dictionary: Words that rhyme with flue

Spanish Central: Translation of flue

Nglish: Translation of flue for Spanish Speakers

Britannica English: Translation of flue for Arabic Speakers

Britannica.com: Encyclopedia article about flue

Comments on flue

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a nest or breeding place

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