smogPronunciation: /smɒg/Translate smog | into French | into German | into Italian | into Spanish Definition of smog noun [mass noun] fog or haze intensified by smoke or other atmospheric pollutants: exhaust emissions are mainly responsible for the smog [count noun]:the fires caused widespread smogsDerivatives smoggy adjective (smoggier, smoggiest)Origin: early 20th century: blend of smoke and fog1smog in other Oxford dictionaries Definition of smog in the US English dictionary
