We found 40 dictionaries that define the word smog:

General (23 matching dictionaries)

1. smog: Longman Dictionary of Contemporary English
2. smog: Merriam-Webster
3. smog: Oxford Learner's Dictionaries
4. smog: American Heritage Dictionary of the English Language
5. smog: Collins English Dictionary
6. smog: Vocabulary.com
7. Smog, smog: Wordnik
8. smog: Cambridge Advanced Learner's Dictionary
9. smog: Wiktionary
10. smog: Webster's New World College Dictionary, 4th Ed.
11. smog: The Wordsmyth English Dictionary-Thesaurus
12. smog: Infoplease Dictionary
13. smog: Dictionary.com
14. smog: Online Etymology Dictionary
15. smog: Cambridge Essential American English Dictionary
16. SMOG (Simple Measure Of Gobbledygook), SMOG (literary group), SMOG, Smog (band), Smog (disambiguation), Smog: Wikipedia, the Free Encyclopedia
17. smog: Rhymezone
18. smog: Stammtisch Beau Fleuve Acronyms
19. smog: FreeDictionary.org
20. smog: Mnemonic Dictionary
21. smog: TheFreeDictionary.com

Business (1 matching dictionary)

22. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

23. smog: Encyclopedia

Medicine (4 matching dictionaries)

24. smog: Merriam-Webster Medical Dictionary
25. Medical Dictionary (No longer online)
26. online medical dictionary (No longer online)
27. smog: Medical dictionary

Miscellaneous (3 matching dictionaries)

28. Brilliant Dream Dictionary (No longer online)
29. SMOG: Acronym Finder
30. AbbreviationZ (No longer online)

Science (2 matching dictionaries)

31. On-Line Biology Book: GLOSSARY (No longer online)
32. Atmospheric Chemistry and Air Quality (No longer online)

Tech (6 matching dictionaries)

33. smog: NATURAL RESOURCES DEFENSE COUNCIL
34. Smog: Glossary of Air Pollution Terms
35. AUTOMOTIVE TERMS (No longer online)
36. Energy Terms (No longer online)
37. Glossary of Meteorology (No longer online)
38. National Weather Service Glossary (No longer online)

(Note: See smogless as well.)

Definitions from Wiktionary ( ) ▸ noun:  A noxious mixture of particulates and gases that is the result of urban air pollution. ▸ verb:  (informal) To get a smog check; to check a vehicle or have it checked for emissions. Similar: smogginess, smaze, smoke, smokescape, firesmoke, smokefall, oilsmoke, groundmist, superfog, ice fog, more... Types: photochemical, ozone, nitrogen dioxide, sulfur dioxide, carbon monoxide, hydrocarbon, black carbon, more... Phrases: photochemical smog, london smog, data smog, electronic smog, Great Smog of London, more... Adjectives: photochemical, urban, industrial, heavy, thick, dense, brown, type, more, yellow, gray Colors:     gray,     charcoal,     smoke,     pewter,     graphite, more... ▸ Word origin ▸ Words similar to smog ▸ Usage examples for smog ▸ Idioms related to smog ▸ Wikipedia articles (New!) ▸ Popular adjectives describing smog ▸ Words that often appear near smog ▸ Rhymes of smog ▸ Invented words related to smog