\ ˈsu̇t How to pronounce soot (audio) , ˈsət, ˈsüt How to pronounce soot (audio) \

Definition of soot

 (Entry 1 of 2)

: a black substance formed by combustion or separated from fuel during combustion, rising in fine particles, and adhering to the sides of the chimney or pipe conveying the smoke especially : the fine powder consisting chiefly of carbon that colors smoke


sooted; sooting; soots

Definition of soot (Entry 2 of 2)

transitive verb

: to coat or cover with soot

Examples of soot in a Sentence

Recent Examples on the Web: Noun If anything, the reduction in aerosols—fine particles that include soot from combustion—might even cause a tiny bit of warming this summer, an article on Weather Underground explains. Ula Chrobak, Popular Science, "COVID-19 has cut air pollution in some countries—but will this blip make a difference?," 30 Mar. 2020 Special cleansing wipes are widely used to help remove soot and other particulates from firefighters’ skin after a call. Alison Knezevich,, "New focus on firefighter cancer: Baltimore-area departments say they recognize the risk and are making changes," 24 Oct. 2019 Willa Hatcher wipes traffic soot from the walls in her high-rise apartment that sits near I-81. Robert Samuels, Washington Post, "The South Side of Syracuse and Highway I-81," 20 Oct. 2019 Water vapor quickly condenses around soot from the plane’s exhaust and freezes to form cirrus clouds, which can last for minutes or hours. Katie Camero, Science | AAAS, "Aviation’s dirty secret: Airplane contrails are a surprisingly potent cause of global warming," 28 June 2019 Federal regulations that limit the emissions of certain chemicals and soot from factories, cars and trucks have helped dramatically improve air quality over recent decades. Anchorage Daily News, "US air quality slips after years of improvement," 18 June 2019 Founded in 1912 in Cincinnati, the company’s primary product—a soft, pliable compound used for wiping soot from wallpaper—was no longer in demand and the firm’s future looked bleak. David Kindy, Smithsonian, "The Accidental Invention of Play-Doh," 18 May 2018 On European models, the exhaust gases are forced through the filter walls, trapping soot that is burned off later. Josh Jacquot, Car and Driver, "Tested: 2020 Porsche 718 Spyder is Music to Our Ears," 19 Mar. 2020 Air pollution kills when particles from burning coal, wood, or natural gas react in the atmosphere to create ozone and soot. Erik Stokstad, Science | AAAS, "Deadly air pollution is blowing into your state from a surprisingly large source," 12 Feb. 2020

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


before the 12th century, in the meaning defined above


1602, in the meaning defined above

History and Etymology for soot


Middle English, from Old English sōt; akin to Old Irish suide soot, Old English sittan to sit

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Time Traveler for soot

Time Traveler

The first known use of soot was before the 12th century

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Statistics for soot

Last Updated

5 Apr 2020

Cite this Entry

“Soot.” Dictionary, Merriam-Webster, Accessed 6 Apr. 2020.

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More Definitions for soot


How to pronounce soot (audio) How to pronounce soot (audio)

English Language Learners Definition of soot

: a black powder that is formed when something (such as wood or coal) is burned


\ ˈsu̇t How to pronounce soot (audio) , ˈsət \

Kids Definition of soot

: a black powder formed when something is burned : the very fine powder that colors smoke

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More from Merriam-Webster on soot

Thesaurus: All synonyms and antonyms for soot

Rhyming Dictionary: Words that rhyme with soot

Spanish Central: Translation of soot

Nglish: Translation of soot for Spanish Speakers

Britannica English: Translation of soot for Arabic Speakers Encyclopedia article about soot

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