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
The plane is believed to have landed in the ocean due to engine failure, the Los Angeles Daily News reported, citing a hazardous materials spill report submitted to the state.
—Stephen Sorace, Fox News, 16 Apr. 2024
From cleaning up hazardous materials to responding to malfunctioning indoor sprinkler systems, any 911 call that doesn’t fit police or Emergency Medical Services goes to them.
—Harriet Ramos, Fort Worth Star-Telegram, 14 Apr. 2024
Thunderstorms are likely to kick off Monday afternoon in parts of Texas, Oklahoma and Kansas but the strongest storms with the most hazardous impacts may not get underway until the evening.
—Mary Gilbert, CNN, 13 Apr. 2024
Three of the barges were empty, and 23 carried cargo such as coal, though there were no hazardous materials on board, city officials said in a news release.
—Eduardo Cuevas, USA TODAY, 13 Apr. 2024
Material in the tailings are hazardous, and can leak acids and metals.
—Caitlin Looby, Journal Sentinel, 10 Apr. 2024
The Dali was carrying products including paper, U.S. soybeans destined for China and some hazardous materials, according to Concirrus, a marine insurance data provider, and DG Global, an agricultural exporter with goods on the ship.
—Peter Eavis, New York Times, 5 Apr. 2024
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
The plane is believed to have landed in the ocean due to engine failure, the Los Angeles Daily News reported, citing a hazardous materials spill report submitted to the state.
—Stephen Sorace, Fox News, 16 Apr. 2024
From cleaning up hazardous materials to responding to malfunctioning indoor sprinkler systems, any 911 call that doesn’t fit police or Emergency Medical Services goes to them.
—Harriet Ramos, Fort Worth Star-Telegram, 14 Apr. 2024
Thunderstorms are likely to kick off Monday afternoon in parts of Texas, Oklahoma and Kansas but the strongest storms with the most hazardous impacts may not get underway until the evening.
—Mary Gilbert, CNN, 13 Apr. 2024
Three of the barges were empty, and 23 carried cargo such as coal, though there were no hazardous materials on board, city officials said in a news release.
—Eduardo Cuevas, USA TODAY, 13 Apr. 2024
Material in the tailings are hazardous, and can leak acids and metals.
—Caitlin Looby, Journal Sentinel, 10 Apr. 2024
The Dali was carrying products including paper, U.S. soybeans destined for China and some hazardous materials, according to Concirrus, a marine insurance data provider, and DG Global, an agricultural exporter with goods on the ship.
—Peter Eavis, New York Times, 5 Apr. 2024
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 24 Apr. 2024.
Copy CitationKids Definition
hazardous
adjective
haz·ard·ous
ˈhaz-ərd-əs
hazardously
adverb
hazardousness
noun
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