smog

noun

\ˈsmäg,

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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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

Scientists say higher sulfur dioxide emissions recorded at the volcano’s vents in recent days are creating the potential for heavier than usual vog, or volcanic smog. — Jennifer Sinco Kelleher, BostonGlobe.com, "Besides lava and ash, Hawaii volcano is pumping out ‘vog’," 29 May 2018 It was first promulgated in recognition of the state’s pioneering auto-emissions regulations (in response to the state’s famously horrific smog problem), even before 1970. — Ed Kilgore, Daily Intelligencer, "Jerry Brown Calls EPA Chief ‘Outlaw Pruitt’," 2 May 2018 Yes, a stock trader can disregard whether kids have trouble breathing due to black smog enveloping their world. — WSJ, "Value Investing Is a Long-Term Commitment," 8 July 2018 And the smoky element is inspired by the city’s infatuation with spirituality — think incense, not the smog that often lingers above the skyline. — Shannon Barbour, The Cut, "Apiece Apart’s New Perfume Is for California Dreaming," 5 June 2018 The ash is a new irritant for a town that's used to coping with volcanic smog from noxious fumes seeping from the summit and eruption vents. — Jennifer Sinco Kelleher, chicagotribune.com, "Final exams moved to gym as ash fills Hawaii classroom," 25 May 2018 Similarly, during significant volcano eruptions, global temperatures can go down because the ash and smog deflects solar radiation away from the earth. — Aj Willingham, CNN, "The earth has had warmer-than-average temperatures for 400 straight months now," 17 May 2018 Can they be suffocated by toxic vog (volcanic smog)? — Gabby Raymond, Time, "Hawaiians Blame Misunderstanding of Volcano and 'Doomsday' Headlines for Big Drop in Tourism," 21 June 2018 Experts expect heavier vog, or volcanic smog, to blanket the interior and southern parts of the Big Island, wrapping around to Kona through the weekend. — CBS News, "Kilauea volcano eruption: Seismic activity increases, earthquakes strike 5 days in a row," 15 June 2018

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.