an·​ti·​freeze | \ ˈan-ti-ˌfrēz How to pronounce antifreeze (audio) \

Definition of antifreeze

1 : a substance added to a liquid (such as the water in an automobile engine) to lower its freezing point
2 : any of various substances (such as proteins or alcohols) that are found in some living organisms (such as certain fish and insects) and serve to lower the freezing point of body fluids especially by limiting ice crystal growth

Examples of antifreeze in a Sentence

Recent Examples on the Web

Contaminants such as lead and antifreeze have long been known to poison condors. San Diego Union-Tribune, "DDT contaminants in marine mammals may threaten California condor recovery," 11 July 2019 Methanol is a type of alcohol that's often used as an ingredient in antifreeze, paint thinner, shellac, and windshield wiper fluid, according to MedlinePlus. Cory Stieg,, "Could Bootleg Alcohol Explain The Dominican Republic Deaths?," 18 June 2019 The bark of ash trees serve as insulation, and before winter, larvae produce an antifreeze-like substance to withstand cold temperatures. Lee Bergquist, Milwaukee Journal Sentinel, "Despite last winter's polar vortex, emerald ash borer continues to march across Wisconsin," 18 June 2019 Some were common to red-blooded fish that are also native to Antarctic waters, like the presence of extra genes for making blood proteins that act like antifreeze. Quanta Magazine, "Icefish Study Adds Another Color to the Story of Blood," 22 Apr. 2019 Their secret is a natural antifreeze that prevents fatal ice crystals from forming inside the frogs’ cells when their hearts and breathing cease. Brian Handwerk, National Geographic, "It’s not just bears: These hibernating animals may surprise you," 7 Mar. 2019 In 2014, the company recycled about 2.5 million gallons of gas, along with a half-million gallons of oil and antifreeze and about 750,000 tons of steel. Ezra Dyer, Popular Mechanics, "How to Hit the Junkyard," 27 Nov. 2018 The startup, called Malta, uses separate vats of molten salt and antifreeze-like liquid to store electricity as thermal energy and dispatch it to the grid when it's needed. Megan Geuss, Ars Technica, "Using molten salt to store electricity isn’t just for solar thermal plants," 24 Dec. 2018 Forget the Céline clutch; the new accessory du jour is a square plastic bottle full of liquid in a shade of green only slightly less electric than antifreeze. Christine Lennon, Harper's BAZAAR, "The Hunger Games," 11 June 2012

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antifreeze.' 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 antifreeze

1903, in the meaning defined at sense 1

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Statistics for antifreeze

Last Updated

18 Jul 2019

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Time Traveler for antifreeze

The first known use of antifreeze was in 1903

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More Definitions for antifreeze



English Language Learners Definition of antifreeze

: a substance that is added to the water in a vehicle's engine to prevent it from freezing


an·​ti·​freeze | \ ˈan-ti-ˌfrēz How to pronounce antifreeze (audio) \

Kids Definition of antifreeze

: a substance added to the water in an automobile radiator to prevent its freezing

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More from Merriam-Webster on antifreeze

Rhyming Dictionary: Words that rhyme with antifreeze

Spanish Central: Translation of antifreeze

Nglish: Translation of antifreeze for Spanish Speakers Encyclopedia article about antifreeze

Comments on antifreeze

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


appealing forcibly to the mind or reason

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