We found 25 dictionaries that define the word hazmat:

General (16 matching dictionaries)

1. hazmat: Merriam-Webster
2. hazmat: Oxford Learner's Dictionaries
3. HAZMAT: American Heritage Dictionary of the English Language
4. hazmat: Collins English Dictionary
5. HAZMAT: Vocabulary.com
6. Hazmat, hazmat: Wordnik
7. HazMat, hazmat: Wiktionary
8. hazmat: Webster's New World College Dictionary, 4th Ed.
9. HAZMAT: Dictionary.com
10. HAZMAT, HazMat (film), HazMat, Hazmat (comics), Hazmat (disambiguation), Hazmat: Wikipedia, the Free Encyclopedia
11. Hazmat: Rhymezone
12. hazmat: Stammtisch Beau Fleuve Acronyms
13. hazmat: FreeDictionary.org
14. hazmat: Mnemonic Dictionary
15. HAZMAT: TheFreeDictionary.com
16. hazmat: Longman Dictionary of Contemporary English

Business (1 matching dictionary)

17. Glossary of Trucking Terms (No longer online)

Medicine (1 matching dictionary)

18. hazmat: Merriam-Webster Medical Dictionary

Miscellaneous (2 matching dictionaries)

19. HAZMAT: Acronym Finder
20. AbbreviationZ (No longer online)

Slang (1 matching dictionary)

21. Hazmat: Urban Dictionary

Tech (4 matching dictionaries)

22. AUTOMOTIVE TERMS (No longer online)
23. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
24. Glossary of Agricultural Terms, Programs and Laws (No longer online)
25. Pool Glossary (No longer online)

(Note: See hazmats as well.)

Definitions from Wiktionary (HazMat) ▸ noun:  (US, often attributive) Hazardous material(s). ▸ noun:  Alternative form of hazmat [(US, often attributive) Hazardous material(s).] Similar: haz-mat, hazwaste, hazardous material, hazardise, hazard, health hazard, hazardize, hazardry, Hazcam, ultrahazardous activity, more... Opposite: non-hazardous, safe, clean Phrases: Hazmat suit, HAZMAT Class 3 Flammable liquids, HAZMAT Class 2 Gases, HAZMAT Class 1 Explosives, HAZMAT Class 6 Toxic and infectious substances, more... Colors:     yellow,     orange,     red,     neon green,     black, more... ▸ Words similar to hazmat ▸ Usage examples for hazmat ▸ Idioms related to hazmat ▸ Wikipedia articles (New!) ▸ Popular adjectives describing hazmat ▸ Words that often appear near hazmat ▸ Rhymes of hazmat ▸ Invented words related to hazmat