preventative

1 of 2

adjective

Synonyms of preventativenext
: devoted to or concerned with preventing something from happening : preventive entry 1
The best preventative medicine that you can give to your plants is to mulch them.Ann Whynman
Los Angeles County promised to revamp its system, gradually reducing the use of expensive inpatient hospitals through more preventative care at outpatient clinics.Jonathan Cohn

preventative

2 of 2

noun

plural preventatives
: something that serves to prevent something from occurring : preventive entry 2
We've got the live vaccinia virus vaccine as a preventative for smallpox …D. A. Henderson et al.
Green onions are a mosquito preventative.Garrison Keillor

Synonyms of preventative

Examples of preventative in a Sentence

Adjective the department in charge of taking preventative measures against international terrorism
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
High-quality swim lessons can be a vital preventative measure to combat this issue. Brittney Melton, NPR, 2 July 2026 Take preventative steps to avoid these injuries altogether, and keep your children away from fireworks—even sparklers in the backyard—no matter what. Parents, 2 July 2026
Noun
Some doctors also prescribe antivirals as a preventative for people who are at high risk for the virus if they are exposed. Nathaniel Weixel, The Hill, 30 Dec. 2025 The latter two often need different treatment than what is found in combination preventatives. Dr. John De Jong, Boston Herald, 18 Jan. 2026 See All Example Sentences for preventative

Word History

First Known Use

Adjective

1655, in the meaning defined above

Noun

1651, in the meaning defined above

Time Traveler
The first known use of preventative was in 1651

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Cite this Entry

“Preventative.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/preventative. Accessed 10 Jul. 2026.

Kids Definition

preventative

adjective or noun

Medical Definition

preventative

adjective or noun

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