smog
noun /smɒɡ/
/smɑːɡ/
[uncountable, countable]- a form of air pollution that is or looks like a mixture of smoke and fog, especially in cities
- attempts to reduce smog caused by traffic fumes
Extra ExamplesTopics The environmentc1- Smog levels are high today.
- a layer of smog over the city
- The streets are clean, there's no traffic, and there's no smog to block out the sunshine.
- Nowadays, smogs are very common in major cities.
Oxford Collocations Dictionaryadjective- heavy
- urban
- photochemical
- …
- layer
- reduce
- alert
- level
Word Originearly 20th cent.: blend of smoke and fog.
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