fur·​nace | \ ˈfər-nəs \

Definition of furnace

: an enclosed structure in which heat is produced (as for heating a house or for reducing ore)

Examples of furnace in a Sentence

Recent Examples on the Web

An overworked furnace can also experience mechanical failures. Wilson Weaver, chicagotribune.com, "3 home improvement issues you should never ignore," 9 Apr. 2018 With the advent of free-standing small furnaces that artists could operate in studios, a new generation began creating vivid, striking and sometimes highly personal works. Peter Saenger, WSJ, "Clearly, Florida Is a Showcase for Glass Art," 26 Dec. 2018 And far in the hazy distance Of that lovely night in June, The blaze of the flaming furnaceGleamed redder than the moon. BostonGlobe.com, "Read the poem that inspired the Longfellow Bridge’s name," 31 May 2018 Turn off the furnace and water heater and turn on exhaust fans. The Good Housekeeping Institute, Good Housekeeping, "How to Draft-Proof Your Home for a Lower Heating Bill," 20 Nov. 2018 JSW Steel is restarting the furnace and investing $500 million in Mingo Junction and Cleveland Cliffs announced a $700 million plant in Toledo. Fox News, "Trump fires up crowd at Ohio rally for Troy Balderson," 5 Aug. 2018 Yes, the first day of the Forecastle Festival was a furnace. Jeffrey Lee Puckett, The Courier-Journal, "Miss Day 1 of Forecastle? No worries, here are 5 things you missed!," 14 July 2018 Don’t let anyone tell you that your furnace has to work harder to bring the temperature up from a cooler temperature. Rebecca Straus, Good Housekeeping, "Is It Better to Leave Your Heat at the Same Temperature All Day or Turn It Down?," 24 Oct. 2016 Indoor plumbing was a big plus, as was a furnace and gas-light fixtures. Emilie Le Beau Lucchesi, Country Living, "Ladies' Home Journal Predicted America's Future Obsession with Real-Estate Reality TV In 1903," 14 July 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'furnace.' 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 furnace

13th century, in the meaning defined above

History and Etymology for furnace

Middle English furnas, from Anglo-French forneise, from Latin fornac-, fornax; akin to Latin formus warm — more at therm

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Dictionary Entries near furnace





furnace black


furnace oil

Statistics for furnace

Last Updated

12 Feb 2019

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Time Traveler for furnace

The first known use of furnace was in the 13th century

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More Definitions for furnace



English Language Learners Definition of furnace

: one for melting metals
chiefly US : one for heating a building or apartment


fur·​nace | \ ˈfər-nəs \

Kids Definition of furnace

: an enclosed structure in which heat is produced (as for heating a house or melting metals)

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More from Merriam-Webster on furnace

Spanish Central: Translation of furnace

Nglish: Translation of furnace for Spanish Speakers

Britannica English: Translation of furnace for Arabic Speakers

Britannica.com: Encyclopedia article about furnace

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a servile follower or underling

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