hazmat

noun

haz·​mat ˈhaz-ˌmat How to pronounce hazmat (audio)
often attributive
: a material (such as flammable or poisonous material) that would be a danger to life or to the environment if released without precautions

Did you know?

The origin of "hazmat" is clear enough - it was formed by combining the first three letters of each of two words: "hazardous" and "material." The word hazmat is fairly young, first appearing in print in 1980. Although it is a noun, "hazmat" tends to be used attributively, meaning that it often appears in sentences before another noun as if it were performing the duties of an adjective (as in "hazmat team" and "hazmat worker").

Examples of hazmat in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Staff often wear hazmat suits due to hazardous conditions. Meg Dunn, CNN Money, 5 Sep. 2025 Photos from the scene, also shared by the Manchester Evening News and The Sun, show crime scene investigators in hazmat suits visiting the property, as a vehicle remained parked out front. Brenton Blanchet, People.com, 24 Aug. 2025 Later, a man in a hazmat suit is examining the contaminant. Alison Foreman, IndieWire, 21 Aug. 2025 Colorado State Patrol hazmat operators are also working on the case, and Denver’s FBI field office has also offered to help. Lauren Penington, Denver Post, 21 Aug. 2025 See All Example Sentences for hazmat

Word History

Etymology

hazardous material

First Known Use

1972, in the meaning defined above

Time Traveler
The first known use of hazmat was in 1972

Browse Nearby Words

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Cite this Entry

“Hazmat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hazmat. Accessed 12 Sep. 2025.

Medical Definition

hazmat

noun
haz·​mat
ˈhaz-ˌmat
often attributive
: a material (as radioactive, flammable, explosive, or poisonous material) that would be a danger to life or to the environment if released without necessary precautions being taken
toxic waste hauled away by workers in hazmat suitsTom Spousta
hazmat storage
Last Updated: - Updated example sentences
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