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Definition of HAZMAT
1. Noun. An abbreviation for 'hazardous material' used on warning signs. "NO HAZMATS IN TUNNEL" 
Definition of HAZMAT
1. hazardous material [n -S]
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1. Noun. An abbreviation for 'hazardous material' used on warning signs. "NO HAZMATS IN TUNNEL" 
1. hazardous material [n -S]