resistant
Americanadjective
noun
adjective
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characterized by or showing resistance; resisting
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-
impervious to the action of corrosive substances, heat, etc
a highly resistant surface
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( in combination )
a heat-resistant surface
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noun
Other Word Forms
Etymology
Origin of resistant
1590–1600; < Middle French resistant, present participle of resister to resist; see -ant
Explanation
Being resistant means to be immune or impervious to something. A vest that's resistant to bullets is bullet-proof. Anything resistant has a certain power — specifically, the power to resist or fight off — something else. This word is often used medically, like when someone is resistant to a virus: that means they can't get the virus. You can also be resistant to someone's jokes, meaning they can't make you laugh. A raincoat should be resistant to water. If it's not resistant, that's a pretty bad raincoat. All resistant things are like a shield that something can't get through.
Vocabulary lists containing resistant
"Harbor Me" by Jacqueline Woodson
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Content Summary 4.2: Columbian Exchange and Atlantic Slavery
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"Roller Girl" by Victoria Jamieson
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A big challenge is dental plaque, a protective structure known as a biofilm that helps bacteria adhere to teeth and makes them more resistant to removal by saliva, mouth rinses and some antimicrobial agents.
From The Wall Street Journal ● Jul. 26, 2026
Actors, writers, production staff and movie fans are still resistant to the overuse of AI and defining when and where it is acceptable, so studios are treading lightly, said AI film studio CEO Mooser.
From Los Angeles Times ● Jul. 26, 2026
"Adapt or fail" is Ambrositsch's stark conclusion, which has led her to plant different varieties more resistant to the heat, and to change how she treats the soil.
From Barron's ● Jul. 26, 2026
The protein also became more resistant to the loss of function caused by nitration, particularly at Y198.
From Science Daily ● Jul. 24, 2026
Since the body can’t break down resistant starch, it slips through the digestive track.
From "The Omnivore's Dilemma" by Michael Pollan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
