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
Past Incidents in the last 12 hours: Heavy rain prompts traffic warning on eastbound K-10 in Olathe
A traffic advisory has been issued for hazardous driving conditions attributed to heavy rain on K-10 from South Woodland Street to Ridgeview Road.
—
Kansas City Star Bot, Kansas City Star, 31 Jan. 2025
Very strong winds will create hazardous conditions with blowing and drifting snow.
—Dan Perry, Newsweek, 31 Jan. 2025
The two paid a third man, Orlando Pagan, of Elkridge, to get rid of the hazardous materials.
—Racquel Bazos, Baltimore Sun, 30 Jan. 2025
The still unidentified ignition sources that sparked the blazes brought together a hazardous set of conditions all at once, said Park Williams, a professor in the geography department at the University of California Los Angeles.
—Dinah Voyles Pulver, USA TODAY, 29 Jan. 2025
See all Example Sentences for hazardous 
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Kansas City Star Bot, Kansas City Star, 31 Jan. 2025
Very strong winds will create hazardous conditions with blowing and drifting snow.
—Dan Perry, Newsweek, 31 Jan. 2025
The two paid a third man, Orlando Pagan, of Elkridge, to get rid of the hazardous materials.
—Racquel Bazos, Baltimore Sun, 30 Jan. 2025
The still unidentified ignition sources that sparked the blazes brought together a hazardous set of conditions all at once, said Park Williams, a professor in the geography department at the University of California Los Angeles.
—Dinah Voyles Pulver, USA TODAY, 29 Jan. 2025
See all Example Sentences for hazardous
Dictionary Entries Near hazardous
Cite this Entry
“Hazardous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hazardous. Accessed 3 Feb. 2025.
Copy CitationKids Definition
hazardous
adjective
haz·ard·ous
ˈhaz-ərd-əs
hazardously
adverb
hazardousness
noun
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