definitions

harmful

[ hahrm-fuhl ]
/ ˈhɑrm fəl /
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SEE MORE SYNONYMS FOR harmful ON THESAURUS.COM

adjective

causing or capable of causing harm; injurious: a harmful idea; a harmful habit.

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RELATED WORDS

inimical, unhealthy, noxious, catastrophic, unsafe, pernicious, adverse, bad, disastrous, detrimental, painful, sinful, toxic, disadvantageous, ruinous, destructive, damaging, risky, baleful, baneful

Nearby words

harlow, jean, harm, harm's way, harmattan, harmensen, jacob, harmful, harmfully, harmless, harmlessly, harmolodics, harmonia

Origin of harmful

before 1000; Middle English; Old English hearmful. See harm, -ful

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for harmful

British Dictionary definitions for harmful

harmful

/ (ˈhɑːmfʊl) /

adjective

causing or tending to cause harm; injurious

Derived Forms

harmfully, adverbharmfulness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012