I. ˈsmäg also ˈsmȯg noun
( -s )
Etymology: blend of smoke (I) and fog
1. : a fog made heavier and darker by smoke and chemical fumes
one of the worst smogs in London's history was … blamed for the deaths of 4000 people — Leonard Parkin
2. : something resembling atmospheric smog : haze 2
behind the smog of sophistry … lie two real issues — Robert Wuliger
II. noun
: a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust