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
Synonyms
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
The new listing will also lead the Department of Transportation to list and regulate these substances as hazardous materials under the Hazardous Materials Transportation Act.
—
Coral Davenport, New York Times, 19 Apr. 2024
And the department fined subcontractor Diversified Insulation, LLC, $3,125 for not maintaining and making readily available to workers copies of safety data sheets for hazardous material.
—Ames Alexander, Charlotte Observer, 16 Apr. 2024
See all Example Sentences for hazardous 
Coral Davenport, New York Times, 19 Apr. 2024
And the department fined subcontractor Diversified Insulation, LLC, $3,125 for not maintaining and making readily available to workers copies of safety data sheets for hazardous material.
—Ames Alexander, Charlotte Observer, 16 Apr. 2024
See all Example Sentences for hazardous
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hazardous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near hazardous
Cite this Entry
“Hazardous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hazardous. Accessed 4 May. 2024.
Copy CitationKids Definition
hazardous
adjective
haz·ard·ous
ˈhaz-ərd-əs
hazardously
adverb
hazardousness
noun
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