hazardous
adjective
haz·ard·ous
ˈha-zər-dəs 
1
: involving or exposing one to risk (as of loss or harm)
a hazardous occupation
disposing of hazardous waste
2
: depending on the effect of unpredictable and unanalyzable forces in determining events : depending on hazard (see hazard entry 1 sense 2a) or chance
hazardous outcomes
hazardously
adverb
hazardousness
noun
Examples of hazardous in a Sentence
It was a hazardous voyage.
These are hazardous chemicals that can cause death if inhaled.
Recent Examples on the Web
Despite receiving safety stamps of approval, the process for building the Las Vegas tunnels came under fire for worker safety violations and concerns, with the project being cited for numerous violations that included injuries and exposure to hazardous materials.
—
Karoline Leonard, Austin American Statesman, 31 July 2025
Grants will be given to projects that remove or reduce hazardous wood materials National Forest System Lands.
—Noël Fletcher, Forbes.com, 30 July 2025
Tyler Swardson with Greenwood Fire said their hazardous materials response team is on site to address any potential hazards.
—Jade Jackson, IndyStar, 30 July 2025
This process includes mitigation of any hazardous materials, such as asbestos, but also demolition of structures.
—Jessica Alvarado Gamez, Denver Post, 29 July 2025
See All Example Sentences for hazardous
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Karoline Leonard, Austin American Statesman, 31 July 2025
Grants will be given to projects that remove or reduce hazardous wood materials National Forest System Lands.
—Noël Fletcher, Forbes.com, 30 July 2025
Tyler Swardson with Greenwood Fire said their hazardous materials response team is on site to address any potential hazards.
—Jade Jackson, IndyStar, 30 July 2025
This process includes mitigation of any hazardous materials, such as asbestos, but also demolition of structures.
—Jessica Alvarado Gamez, Denver Post, 29 July 2025
See All Example Sentences for hazardous
Cite this Entry
“Hazardous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hazardous. Accessed 4 Aug. 2025.
Copy CitationKids Definition
hazardous
adjective
haz·ard·ous
ˈhaz-ərd-əs
hazardously
adverb
hazardousness
noun
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