from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Fog that has become mixed and polluted with smoke.
  • n. A form of air pollution produced by the photochemical reaction of sunlight with hydrocarbons and nitrogen oxides that have been released into the atmosphere, especially by automotive emissions.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A noxious mixture of particulates and gases that is the result of urban air pollution
  • v. To get a smog check; to check a vehicle or have it checked for emissions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. air pollution by a mixture of smoke and fog


from The American Heritage® Dictionary of the English Language, 4th Edition

sm(oke) + (f)og1.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Blend of smoke and fog


  • In general the term smog has become connected to a situation where visibility is significantly impaired as a result of local air pollution.


  • The term smog, a contraction of smoke and fog, was introduced in 1905 by Dr. H.A. des Vœux to describe the mixture of soot, sulfuric acid, and other pollutants in emissions from coal furnaces in London.


  • The term smog was first used in 1905 to describe the conditions of fog that had soot or smoke in it.

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  • Estimating the economic cost of our addiction is difficult; direct subsidies to oil and oil using systems are often complex and artfully concealed but estimates calculate the subsidy at around $20 per barrel of oil; but what "cost" should we add for a child who develops asthma from breathing in smog?

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  • I remember when there was real pollution, on most days Los Angeles was so covered in smog you could not see the mountains or the city skyline; trash everywhere, the smell of leaded gas filled our noses.

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  • True, the smog is not quite so thick and unhealthy as in Monterrey itself, but over time will prove intolerable. jerezano


  • In the Loop the smog is high because there are too many people who drive in to work rather than take public transit.

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  • Countless cities are smothered in smog while hundreds of millions of citizens lack access to clean drinking water.

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  • When the city smog is bad all that can be seen of Samsara beyond his mask are the crawling oil-slick dreadlocks, unbound.

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  • All of them come to Mexico for a quick thrill, ersatz mysticism, mind-altering substances and experiences flowing like smog from a linea roja bus, spending infected bodily fluids faster than you can say "Moctezuma's Revenge."

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