pre·​ven·​tion | \ pri-ˈven(t)-shən How to pronounce prevention (audio) \

Definition of prevention

: the act of preventing or hindering

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Examples of prevention in a Sentence

Exercise and diet play a role in the prevention of heart disease. good crowd control is crucial to the prevention of riots

Recent Examples on the Web

Supporters of private services say the main motivation is prevention, not profit. Peter Rowe, San Diego Union-Tribune, "Hot issue: as wildfires spread, so do private firefighting firms," 1 Sep. 2019 Omega-3 oils are also being researched in connection with infant health, cancer prevention, Alzheimer’s disease, cognitive function and rheumatoid arthritis. Environmental Nutrition,, "How to choose the best oil for you," 28 Aug. 2019 Three suicide prevention strategies show real promise. Eva Frederick, Science | AAAS, "Top stories: manta ray ‘friendships,’ preventing suicide, and a hidden hotbed of Zika," 23 Aug. 2019 Foreman recommends calling your legislators to ask about suicide prevention plans in your state. Lizz Schumer, Woman's Day, "Is Suicide Preventable? Experts Weigh In," 22 Aug. 2019 The new version of Edge can be configured to enable tracking prevention in three levels, Basic, Balanced and Strict, to help block cookies and allow users to surf the web privately. Mark Hachman, PCWorld, "Microsoft Edge in Chromium goes beta, and Microsoft says it's ready for everyday use," 20 Aug. 2019 Lara, Ma and Dodd argued that a new financial model — relying on insurance to pay for disaster response, rather than dipping into state reserves — would free up resources to do more wildfire prevention work. Alexei Koseff,, "California officials warn of ‘unsustainable’ taxpayer costs in disaster bill," 13 Aug. 2019 The best way to protect your pet from these lethal algal bloom is prevention. Eric Todisco,, "Three Dogs Die of Toxic Algae Poisoning Hours After Playing By North Carolina Pond," 12 Aug. 2019 Vaccination is the most effective prevention, but many adults have not been vaccinated. Katrina Pross, Twin Cities, "Minnesota homeless, drug users hit by hepatitis A outbreak, health department says," 8 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prevention.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of prevention

15th century, in the meaning defined above

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Statistics for prevention

Last Updated

6 Sep 2019

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Time Traveler for prevention

The first known use of prevention was in the 15th century

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English Language Learners Definition of prevention

: the act or practice of stopping something bad from happening : the act of preventing something


pre·​ven·​tion | \ pri-ˈven-shən How to pronounce prevention (audio) \

Kids Definition of prevention

: the act or practice of keeping something from happening the prevention of fires

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Comments on prevention

What made you want to look up prevention? Please tell us where you read or heard it (including the quote, if possible).


to make a temporary encampment

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