First Known Use: 1884
Dictionary
smog
noun \ˈsmäg, ˈsmȯg\
: fog mixed with smoke : a cloud of dirty air from cars, factories, etc., that is usually found in cities
Full 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
— smog·less \ˈsmä-gləs, ˈsmȯ-\ adjective
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Origin of SMOG
smoke + fog
SMOG Defined for Kids
smog
noun \ˈsmäg\
Definition of SMOG for Kids
: a fog made heavier and thicker by the action of sunlight on polluted air
Medical Dictionary
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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