hazmat

IPA/ˈhæzmæt/
IPA/ˈhæzmæt/

hazmat — noun

1. short for 'hazardous material' — any chemical, biological, or radioactive substa

1.nounB2
Definition

short for 'hazardous material' — any chemical, biological, or radioactive substance that can harm people, animals, or the environment if it leaks or is not handled safely.

Example

A truck carrying hazmat overturned on Highway 17, forcing the evacuation of nearby homes.

noun modifier: carrying hazmat

Roya put on a hazmat suit before cleaning up the chemical samples.

collocation: hazmat suit

Common collocations
  • hazmat suit
  • hazmat team
  • hazmat spill
  • hazmat waste
  • hazmat container
  • hazmat label
  • hazmat incident
  • hazmat worker
Synonyms
  • dangerous substance

    more general; hazmat is specifically the abbreviation for this phrase

  • hazardous material

    the full form; hazmat is the shortened version

  • toxic waste

    narrower — refers specifically to poisonous industrial by-products, not all hazmat

Grammar Patterns

hazmat + noun (suit / team / spill)

hazmat + verb (spill / leak / transport)

Usage Note

Hazmat appears most frequently as a modifier before another noun (suit, team, spill, waste, label). It is not usually used as a count noun — you would say 'hazmat was found at the scene,' not 'a hazmat was found.'

Common Mistakes

The hazmat was found on the floor.' (vague — hazmat is the category, not the item).
Hazmat waste was found leaking on the floor.
add a category noun after hazmat to specify the type of dangerous material.
I work with hazmats every day.
I work with hazmat materials every day.
hazmat is uncountable and does not take a plural -s.

Word family

Synonym discussion

Sense: noun/1

All four terms refer to things that can cause harm, but they differ in scope. 'Hazmat' and 'hazardous material' are direct equivalents; hazmat is simply the shortened form used in official and emergency contexts. 'Dangerous substance' is the broadest of the group — it covers any harmful material, including biological, chemical, and physical hazards, not just those regulated as hazmat. 'Toxic waste' is narrower: it refers specifically to poisonous industrial by-products, typically in waste-disposal contexts. 'Chemical' is both broader and more neutral — not all chemicals are hazardous, and 'chemical' does not carry the safety-regulation sense that hazmat does. Use hazmat when referring to regulated dangerous goods in transport, storage, or emergency-response situations.

hazardous materialdangerous substancetoxic wastechemical ↗

Common collocations

Nouns

Phrases

  • hazmat disposal
  • hazmat storage
  • hazmat removal
  • hazmat response

Etymology

English

Hazmat is a blend formed from the first syllables of 'hazardous' and 'material.' The term was coined by the United States Department of Transportation in the mid-20th century to classify dangerous goods for shipping and rail transport. It entered public awareness through news coverage of chemical spills, factory accidents, and the distinctive yellow protective suits worn by emergency crews.

First known use

1972

1972, in the meaning defined above