\ ˈflü How to pronounce flue (audio) \

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

The flue did exactly what it was supposed to do and contained the fire. Anna Bauman, Detroit Free Press, "Fire breaks out at Parc restaurant in downtown Detroit," 16 July 2019 The gators were moved to the Horticultural Building and housed near hot-air flues in boxes, where the reported the temperature was about 90 degrees. Charles J. Johnson, chicagotribune.com, "The Humboldt alligator is all the rage, but the 1893 World’s Fair gators in Jackson Park are the original creatures from the Chicago lagoon," 28 June 2019 The outside is generally brick, but the flue—the interior column—is typically made of clay tile. Kevin Dupzyk, Popular Mechanics, "So You Want To Fix Your Chimney," 21 Dec. 2018 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

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.

See More

First Known Use of flue

1582, in the meaning defined above

History and Etymology for flue

origin unknown

Keep scrolling for more

Learn More about flue

Statistics for flue

Look-up Popularity

Time Traveler for flue

The first known use of flue was in 1582

See more words from the same year

Keep scrolling for more

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 How to pronounce flue (audio) \

Kids Definition of flue

: an enclosed passage for smoke or air

Keep scrolling for more

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

What made you want to look up flue? Please tell us where you read or heard it (including the quote, if possible).


a bell tower

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!