Definition of hazardous
- a hazardous occupation
- disposing of hazardous waste
It was a hazardous voyage.
These are hazardous chemicals that can cause death if inhaled.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hazardous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: involving risk or danger
What made you want to look up hazardous? Please tell us where you read or heard it (including the quote, if possible).
investment of mental or emotional energy
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