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

The study could also have applications for flash freezing food, creating tastier ice cream or even developing antifreeze materials. Knvul Sheikh, New York Times, "Watch Soap Bubbles Turn Into Tiny Snow Globes as They Freeze," 18 June 2019 Ethylene oxide is used to make ethylene glycol, which is used to make polyester fiber for clothes, upholstery, carpet and pillows and the blending of automotive engine antifreeze. Marissa Luck, Houston Chronicle, "Ineos to expand Alvin, Texas petrochemical plant," 9 July 2019 Methanol is a toxic, synthetic chemical normally used in antifreeze that’s also used, illegally, to create counterfeit alcohol. Stephie Grob Plante, Vox, "Tourist deaths in the Dominican Republic are sparking concern among travelers," 26 June 2019 Methanol is a type of alcohol used in antifreeze that is not safe for humans to ingest, the Post added. Martha Ross, The Mercury News, "Dominican Island resort investigating mystery illness of ‘Bachelor’s’ Melissa Rycroft," 21 June 2019 Chemicals like antifreeze are common, and licking them can cause serious illness. Laura J. Moss, National Geographic, "The Wild Life: Who let the dogs out?," 12 June 2019 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

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.

See More

First Known Use of antifreeze

1903, in the meaning defined at sense 1

Keep scrolling for more

Learn More about antifreeze

Statistics for antifreeze

Last Updated

12 Sep 2019

Look-up Popularity

Time Traveler for antifreeze

The first known use of antifreeze was in 1903

See more words from the same year

Keep scrolling for more

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

Keep scrolling for more

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).


tired or exhausted

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!