harmful
adjective
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Definition of harmful
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Other Words from harmful
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adverb
Synonyms & Antonyms for harmful
Synonyms
adverse, bad, baleful, baneful, damaging, dangerous, deleterious, detrimental, evil, hurtful, ill, injurious, mischievous, nocuous, noxious, pernicious, prejudicial, wicked
Antonyms
anodyne, benign, harmless, hurtless, innocent, innocuous, inoffensive, safe
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Examples of harmful in a Sentence
Recent Examples on the Web
Adams said science shows that marijuana is harmful to the developing brains of teenagers and to the human fetus. — Author: Ricardo Alonso-zaldivar, Anchorage Daily News, "‘This ain’t your mother’s marijuana,’ surgeon general says," 30 Aug. 2019 Adams said science shows that marijuana is harmful to the developing brains of teenagers and to the human fetus. — Ricardo Alonso-zaldivar, chicagotribune.com, "As more states legalize marijuana, federal health officials issue warning on use by teens, pregnant women," 29 Aug. 2019 These include eliminating viruses in pigs that could be harmful to people, which could lay the foundations for pig-to-human organ transplants. — Fox News, "New gene-editing technology could help treat Huntington's disease, premature aging, study says," 29 Aug. 2019 History shows that facing any primary challenger able to gain some national traction can be harmful to a sitting president. — Will Weissert, Fortune, "Why Republicans Running Against Trump Won’t Get Much Help From Their Party," 26 Aug. 2019 History shows that facing any primary challenger able to gain some national traction can be harmful to a sitting president. — San Diego Union-Tribune, "Trump seeks to avoid primary challenge and repeat of history," 26 Aug. 2019 The government argues the deal would be harmful to competition. — Dallas News, "Southlake-based Sabre plans to fight Justice Department's antitrust lawsuit," 20 Aug. 2019 Lead poisoning, which is especially harmful to children and pregnant women, can lead to miscarriages and developmental issues in unborn babies. — Meilan Solly, Smithsonian, "Notre-Dame Restoration Delayed Due to Lead Poisoning Concerns," 13 Aug. 2019 Cigarette butts also carry a heavy load of toxic materials that can be harmful to nearby marine life, a threat that Novotny tested in the lab. — National Geographic, "Cigarette butts are toxic plastic pollution. Should they be banned?," 9 Aug. 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'harmful.' 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 harmful
harmful
adjective
English Language Learners Definition of harmful
See the full definition for harmful in the English Language Learners Dictionary
harmful
adjective
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Kids Definition of harmful
harmful
adjectiveLegal Definition of harmful
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