Definition of “smog” - English Dictionary

“smog” in British English

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smognoun [ S or U ]

uk /smɒɡ/ us /smɑːɡ/

(Definition of “smog” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“smog” in American English

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smognoun [ C/U ]

us /smɑɡ, smɔɡ/

air pollution caused by smoke or chemicals mixing with fog:

[ U ] We get a lot of smog downtown.
smoggy
adjective us /ˈsmɑɡ·i, ˈsmɔ·ɡi/

a smoggy city/day

(Definition of “smog” from the Cambridge Academic Content Dictionary © Cambridge University Press)