smog

noun
\ ˈsmäg How to pronounce smog (audio) , ˈsmȯg \

Definition of smog

: a fog made heavier and darker by smoke and chemical fumes also : a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust

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Other Words from smog

smogless \ ˈsmä-​gləs How to pronounce smog (audio) , ˈsmȯ-​ \ adjective

Synonyms for smog

Synonyms

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Examples of smog in a Sentence

the city's smog was once so bad that darkness often prevailed, even at noon
Recent Examples on the Web Air quality has been poor in the region for decades, in part because the landscape forms a basin where smog lingers. NBC News, "'Treated like sacrifices': Families breathe toxic fumes from California's warehouse hub," 27 Apr. 2021 However, smog was present in China over the previous few weeks, and a new five-year development plan did not feature specific ideas on combatting climate change that environmental groups were looking for. Jacob Muñoz, Smithsonian Magazine, "Largest Dust Storm in More Than a Decade Blanketed China This Week," 19 Mar. 2021 Scientists have observed this new particle formation process with gases such as sulfuric acid, particularly over urban areas, where the chemical is abundant, and hypothesize that smog arises largely as a result of new particle formation. Quanta Magazine, "Cloud-Making Aerosol Could Devastate Polar Sea Ice," 23 Feb. 2021 The reason why is simple: Before the pandemic lockdowns, the air was filled with smog. Jennifer Clare Ball, Wired, "Pandemic Lockdowns Did Cut Air Pollution—but With a Catch," 12 Apr. 2021 Since ozone, a key component of smog, usually forms along the Wasatch Front at those temperatures, Utah was expected to have an especially bad air quality year. Marina Mcnairy, The Salt Lake Tribune, "Here’s a simple plan to help clean up Utah’s air: keep workers home during pollution buildups," 15 Mar. 2021 Everything was brand-new to me and the air was thick with smog. Julia Wick, Los Angeles Times, "Essential California: Understanding the regional stay-at-home order," 4 Dec. 2020 And if Nike dares stray from the beloved Dodger blue, perhaps a lovely smog brown would be appropriate. Chuck Schilken, Los Angeles Times, "Red Sox in yellow and blue? What’s next ... Dodger chartreuse?," 6 Apr. 2021 Even here, in the country’s second-oldest national park, the horizon is the sickly yellow of a cigarette butt, a vaporous mixture of Central Valley smog and forest fire smoke from the myriad infernos burning across the state. Thayer Walker, Scientific American, "Are Giant Sequoia Trees Succumbing to Drought?," 29 Dec. 2016

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

1880, in the meaning defined above

History and Etymology for smog

smoke + fog

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Statistics for smog

Last Updated

5 May 2021

Cite this Entry

“Smog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/smog. Accessed 10 May. 2021.

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More Definitions for smog

smog

noun

English Language Learners Definition of smog

: fog mixed with smoke : a cloud of dirty air from cars, factories, etc., that is usually found in cities

smog

noun
\ ˈsmäg How to pronounce smog (audio) \

Kids Definition of smog

: a fog made heavier and thicker by the action of sunlight on polluted air

smog

noun
\ ˈsmäg also ˈsmȯg \

Medical Definition of smog

: a fog made heavier and darker by smoke and chemical fumes also : a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust

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Comments on smog

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