n.
Pronunciation: ' smäg, ' smo ̇ g
Function: noun
Etymology: sm oke + f og
Date: 1884
: 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 \ ' smä-gl ə s, ' smo ̇ - \ adjective