\ 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 Super-fine shots of fuel into these ducts yield a more even premixture enabling more complete, lower temperature combustion with less NOx and soot. Eric Tegler, Popular Mechanics, "Is the World Ready for the EV Battery Boom?," 3 Aug. 2020 In the Nigerian city of Port Harcourt, part of its oil-producing region, black soot settles on everything. The Economist, "Smoke gets in your eyes Africa’s skies are badly polluted," 1 Aug. 2020 White Americans are exposed to 14% less soot from tailpipes than the average American (Greenwire, June 27, 2019). Jean Chemnick, Scientific American, "Soot Rule Thrusts EPA into Spotlight on Race," 12 June 2020 The Environmental Protection Agency has estimated that tailpipe emissions from the newest passenger cars, SUVs, trucks, and buses generate about 99 percent less smog-producing exhaust and soot than those from the 1970 models did. Sam Roberts,, "John J. Mooney, inventor of the catalytic converter," 28 June 2020 As in every Alaska summer, this recycled, liquid air freshener has captured billions of soot and dust particles, pulling them from the sky and slamming them quietly to the ground. Anchorage Daily News, "Appreciating rain during Alaska’s all-too-brief summer," 27 June 2020 The grooves provided space in which the soot could lodge. Ron Spomer, Outdoor Life, ".260 Remington vs. 6.5 Creedmoor: It’s All About Understanding Rifle Twist Rates," 24 June 2020 Responding officers noticed the odor of gasoline coming from Dougherty, and he was covered in dark soot, police said. Justin L. Mack, The Indianapolis Star, "Police: Whiteland firefighter accused in 3 arsons was covered in soot, smelled of gas," 19 June 2020 In April, the EPA declined to strengthen national standards for industrial soot pollution, rejecting tighter limits environmentalists and the agency’s own scientists said were needed to protect public health. Abby Smith, Washington Examiner, "EPA to add new hazardous air pollutant to list of regulated substances for first time ever," 17 June 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

9 Aug 2020

Cite this Entry

“Soot.” Dictionary, Merriam-Webster, Accessed 11 Aug. 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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