antifreeze

noun

an·​ti·​freeze ˈan-ti-ˌfrēz 

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

For protection against the cold, these butterflies experience a pause in their development and produce a natural antifreeze that keeps them from freezing. —Karen Brewer Grossman, Southern Living, 7 Jan. 2026

Check antifreeze, batteries and these other parts ahead of winter storms During cold weather, your vehicle may require twice the amount of current than normal to get the engine to start. —Anthony Robledo, USA Today, 16 Dec. 2025

There’s a good reason why engine antifreeze made from ethylene glycol isn’t found in the frozen food section, after all. —Andrew Paul, Popular Science, 8 Oct. 2025

Per a receipt found at the scene, he was expected to return the next day for antifreeze. —Randall Colburn, Entertainment Weekly, 7 Oct. 2025

Word History

First Known Use

1903, in the meaning defined at sense 1

Rhymes for antifreeze

• abcs
• absentees
• addressees
• adoptees
• allottees
• amputees
• appellees
• appointees
• arrestees
• artistes
• assamese
• assignees

Kids Definition

antifreeze

noun

an·​ti·​freeze ˈant-i-ˌfrēz 

: a substance added to a liquid (as the water in an automobile radiator) to prevent freezing