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 That's factoring in tax credits at time of purchase of a new EV and lower maintenance costs because EVs have fewer parts and don't need regular care such as oil changes or antifreeze. Mark Phelan, Detroit Free Press, 26 Oct. 2021 For cars, radiators should be serviced, drivers should maintain the proper antifreeze level, the gas tank should be kept full, windshield washers should have wintertime formula and users should check the tread on tires. Julia Musto, Fox News, 28 Sep. 2021 Wisconsin prosecutors have resorted to the Hail Mary play in their bid to keep Mark Jensen in prison for the 1998 death of wife Julie, who died of antifreeze poisoning Jensen insists was a suicide. Bruce Vielmetti, Milwaukee Journal Sentinel, 19 Aug. 2021 One challenge is that these antifreeze protein molecules are present in very low concentrations in nature. Tong (toni) Wang, The Conversation, 16 Aug. 2021 Vaccine skeptics claim the shots contain polyethylene glycol, an active ingredient in antifreeze. Leada Gore |, al, 4 Nov. 2021 In 2008 Schroeder presided over the homicide trial of Mark Jensen, who was accused of poisoning his wife with antifreeze a decade earlier. Ray Sanchez, CNN, 31 Oct. 2021 Schroeder was also in the national spotlight in the trial of Mark Jensen, a Wisconsin man who was accused of murdering his wife by poisoning her with antifreeze in 1998. NBC News, 27 Oct. 2021 Woolly bears' natural antifreeze and their instinct to burrow under leaves and other organic debris are their real survival tools. Lilly St. Angelo, The Indianapolis Star, 27 Sep. 2021

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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Time Traveler for antifreeze

Time Traveler

The first known use of antifreeze was in 1903

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Last Updated

19 Nov 2021

Cite this Entry

“Antifreeze.” Dictionary, Merriam-Webster, Accessed 28 Nov. 2021.

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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

More from Merriam-Webster on antifreeze

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


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