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Definitions

hazardous

[haz-er-duhs] / ˈhæz ər dəs /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Abruptly capping wells is geologically hazardous: sudden pressure drops clog wellbores with heavy waxes.

From The Wall Street Journal • Apr. 8, 2026

As of Wednesday morning, Chiang Mai's PM2.5 level, which refers to the concentration of tiny, hazardous particles smaller than 2.5 micrometres, was classified as "very unhealthy".

From BBC • Mar. 31, 2026

Manufacturing batteries is “extremely energy intensive,” involves more dangerous chemicals and results in more hazardous waste.

From The Wall Street Journal • Mar. 18, 2026

The National Weather Service warned that the heat wave, in addition to bringing risks of heat stress, also will create hazardous conditions along rivers as rapid snowmelt causes rising water levels and swift currents.

From Los Angeles Times • Mar. 15, 2026

I could take risks— that was on me—but I wasn’t about to drag Spoon and Ema into that particular hazardous zone.

From "Shelter (Book One): A Mickey Bolitar Novel" by Harlan Coben




Vocabulary lists containing hazardous