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Definition of smog
smog
/smɑːɡ/
smog
Plural:smogs
•Adjective:smoggy
smog Lexical Profile
CEFR
B2
Grade
5
Tier
2
Usage
Top 10k
Syllables
1
smog Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
Fog or haze intensified by smoke, vehicle exhaust, or other atmospheric pollutants.
Example
"A thick blanket of smog settled over the valley during the summer heatwave, obscuring the distant mountains."
Synonyms
View all synonyms for smog• Rhymes for smog
Word Origin & Etymology
Coined in 1905 by Dr. Henry Antoine Des Voeux as a portmanteau blending 'smoke' and 'fog' to describe the polluted atmospheric haze over British cities.
Cite this Entry
Wordmom. (2026). Definition of Smog. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/smog