hazardous
adjective
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Definition of hazardous
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Synonyms & Antonyms for hazardous
Synonyms
dangerous, grave, grievous, jeopardizing, menacing, parlous, perilous, risky, serious, threatening, unhealthy, unsafe, venturesome
Antonyms
harmless, innocent, innocuous, nonhazardous, nonthreatening, safe, unthreatening
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Examples of hazardous in a Sentence
Recent Examples on the Web
These materials are hazardous if improperly discharged. — Bruce Murphy, The Verge, "Wisconsin’s $4.1 billion Foxconn boondoggle," 29 Oct. 2018 Planes were warned of the ash clouds because volcanic ash is hazardous for their engines. — Fox News, "Volcano erupts on same Indonesian island as earlier quake," 3 Oct. 2018 Breathing in Houston can be hazardous to your health. — Alex Park, Houston Chronicle, "Air pollution poses health risk to Houstonians, study finds," 3 July 2018 While the lure of taking a picture or video that goes viral on social media is strong, officials say the lava areas are still hazardous. — Chris Morris, Fortune, "Hawaiian Tourists Face Up to $5,000 Fine for Taking Volcano Pictures," 18 June 2018 Breathing laze plumes can be hazardous, causing a range of effects that include lung damage and irritation of the eyes and skin. — Maya Wei-haas, Smithsonian, "A Brief Glossary of Volcano Vocab," 25 May 2018 This cuspate ash, as it’s called, is hazardous to humans in two ways. — Nsikan Akpan, Scientific American, "Kilauea’s Lava Is Now Spilling into the Ocean. Here’s Why That’s Dangerous," 22 May 2018 Offering a test for Down syndrome alongside tests for conditions like HIV reinforces the idea that this syndrome is hazardous. — Chris Kaposy, STAT, "Children with Down syndrome live good lives. Prenatal testing shouldn’t nudge parents toward pregnancy termination," 18 May 2018 That’s almost double the upper limit of what’s considered hazardous. — Umair Irfan, Vox, "New Delhi is once again the most polluted city on Earth," 8 Nov. 2018These 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.
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More Definitions for hazardous
hazardous
adjective
English Language Learners Definition of hazardous
See the full definition for hazardous in the English Language Learners Dictionary
hazardous
adjective
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Kids Definition of hazardous
hazardous
adjectiveLegal Definition of hazardous
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