harmful

adjective

harm·​ful ˈhärm-fəl How to pronounce harmful (audio)
: of a kind likely to be damaging : injurious
harmfully adverb
harmfulness noun

Examples of harmful in a Sentence

DDT has been proven to be extremely harmful to the environment.
Recent Examples on the Web The following sections explore practical strategies for reversing these harmful impacts through empowering management practices. Jonathan H. Westover, Forbes, 9 Oct. 2024 It’s designed for people with dry and combination skin, providing deep hydration and nourishment without harmful fragrances, parabens, or phthalates. Clara McMahon, People.com, 9 Oct. 2024 Novels that leave wrongdoing out of their worlds imply that no transgression, marital or otherwise, could be that small, and that for a character to do something genuinely harmful would bring their whole life crashing down. Lily Meyer, The Atlantic, 8 Oct. 2024 University of Pennsylvania climate scientist Michael Mann expressed worries on the ethics framework that just talking about guidelines will make the tinkering more likely to occur in the real world, something that could have harmful side effects. Eleanor Pringle, Fortune, 8 Oct. 2024 See all Example Sentences for harmful 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'harmful.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of harmful was in the 14th century

Dictionary Entries Near harmful

Cite this Entry

“Harmful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/harmful. Accessed 22 Oct. 2024.

Kids Definition

harmful

adjective
harm·​ful ˈhärm-fəl How to pronounce harmful (audio)
: causing damage : injurious
harmfully adverb
harmfulness noun

Legal Definition

harmful

adjective
harm·​ful
: of a kind likely to cause harm
harmfully adverb
harmfulness noun

More from Merriam-Webster on harmful

Last Updated: - Updated example sentences
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