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antifreeze

American  
[an-ti-freez, an-tee-] / ˈæn tɪˌfriz, ˈæn ti- /

noun

  • antifreezes
    plural
  1. a liquid used in the radiator of an internal-combustion engine to lower the freezing point of the cooling medium.


antifreeze British  
/ ˈæntɪˌfriːz /

noun

  1. a liquid, usually ethylene glycol (ethanediol), added to cooling water to lower its freezing point, esp for use in an internal-combustion engine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms


Etymology

Origin of antifreeze

First recorded in 1910–15; anti- + freeze


Explanation

Antifreeze is a liquid that lowers the freezing point of water. People put antifreeze in cars so water in the engine doesn't freeze. When water or another liquid freezes, it becomes a solid. A word starting with the prefix anti works against something. Antifreeze is a synthetic liquid that keeps water (or another liquid) from freezing by lowering the freezing point. This is important for many kinds of engines, such as car engines. In climates with very low temperatures in winter, putting antifreeze in cars is important. Antifreeze is crucial to many other machines and gadgets, because frozen liquid can disturb their operation.

Keep Reading on Vocabulary.com

Vocabulary lists containing antifreeze

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.

See Examples For:

Further investigation showed that these unusual genes produce antifreeze proteins.

From Science Daily ● Mar. 26, 2026

Producers are expected to add antifreeze into the gas stream, for instance.

From Barron's ● Jan. 22, 2026

Having winter tyres for extra grip, topping up screen wash and using antifreeze are all measures that can go a long way.

From BBC ● Jan. 6, 2026

The colorless gas is also used to make chemicals found in products such as antifreeze, detergents, plastics and adhesives.

From Los Angeles Times ● Aug. 16, 2025

Her teacher said that the lemmings had a chemical similar to antifreeze in their blood, that kept them active all winter when other little mammals were hibernating.

From "Julie of the Wolves" by Jean Craighead George

Say the words “gas station food” and a certain image probably comes to mind: Dusty, sodium-packed snacks nestled among neon antifreezes and pine-scented air fresheners.

From The Wall Street Journal ● Jun. 6, 2026

Minard says the overall cost of making it will be ‘near to or lower than’ ethylene glycol antifreezes, and they are optimistic it will be reach the market within a few years.

From Scientific American ● Mar. 27, 2015

Unlike the protein antifreezes of other beetles, snow fleas and moths, the Upis antifreeze is a complex sugar called xylomannan that is as effective at suppressing ice growth as the most active insect protein antifreezes.

From New York Times ● Jan. 19, 2010

The first animal antifreezes were identified several decades ago in the blood plasma of Antarctic fish by Arthur DeVries, now at the University of Illinois, and his colleagues.

From New York Times ● Jan. 19, 2010

In the most frigid polar waters, fish and other animals flourish, their blood kept fluid by biochemical antifreezes.

From Time Magazine Archive

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