biohazard
noun
bio·haz·ard
ˈbī-ō-ˌha-zərd 
: a biological agent or condition that is a hazard to humans or the environment
also
: a hazard posed by such an agent or condition
Examples of biohazard in a Sentence
The gasoline spill created a serious biohazard.
Recent Examples on the Web
Neighbors complained of odors emanating from the business after some animals in freezers were allowed to defrost, and in September, the city of San Marcos got a court order to enter the premises and hired a contractor to clean up the biohazard.
—
Karen Kucher, San Diego Union-Tribune, 4 Dec. 2025
Initially, the Fort Worth Stockyards’ twice daily cattle drive was paused out of caution after the Texas Animal Health Commission and The Texas Department of Agriculture called on horsemen to monitor their herds and take biohazard precautions.
—Fousia Abdullahi, Fort Worth Star-Telegram, 28 Nov. 2025
In some states, depending on the circumstances of the death, you may be required to hire biohazard specialists before renting the place out again.
—Lew Sichelman, Miami Herald, 31 Oct. 2025
The dogs, which were restricted to the property by wireless perimeter collars, were euthanized due to the biohazard of consuming human remains, the outlet said.
—Raven Brunner, PEOPLE, 12 Oct. 2025
See All Example Sentences for biohazard
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Karen Kucher, San Diego Union-Tribune, 4 Dec. 2025
Initially, the Fort Worth Stockyards’ twice daily cattle drive was paused out of caution after the Texas Animal Health Commission and The Texas Department of Agriculture called on horsemen to monitor their herds and take biohazard precautions.
—Fousia Abdullahi, Fort Worth Star-Telegram, 28 Nov. 2025
In some states, depending on the circumstances of the death, you may be required to hire biohazard specialists before renting the place out again.
—Lew Sichelman, Miami Herald, 31 Oct. 2025
The dogs, which were restricted to the property by wireless perimeter collars, were euthanized due to the biohazard of consuming human remains, the outlet said.
—Raven Brunner, PEOPLE, 12 Oct. 2025
See All Example Sentences for biohazard
Cite this Entry
“Biohazard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biohazard. Accessed 13 Dec. 2025.
Copy CitationMedical Definition
biohazard
noun
bio·haz·ard
ˈbī-ō-ˌhaz-ərd, -ˈhaz-
: a biological agent or condition (as an infectious organism or insecure laboratory procedures) that constitutes a hazard to humans or the environment
also
: a hazard posed by such an agent or condition
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