Definition of antifreeze noun from the Oxford Advanced Learner's Dictionary

 

antifreeze

 noun
noun
BrE BrE//ˈæntifriːz//
 
; NAmE NAmE//ˈæntifriːz//
 
[uncountable]
 
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a chemical that is added to the water in the radiator of cars and other vehicles to stop it from freezing Lack of antifreeze is a major cause of highway breakdowns. Check the antifreeze to make sure there is enough in the system.
See the Oxford Advanced American Dictionary entry: antifreeze