Definition of coolant in English:


Syllabification: cool·ant
Pronunciation: /ˈko͞olənt


  • A liquid or gas that is used to remove heat from something.
    More example sentences
    • They are designed to dissipate the heat, which the coolant has absorbed from the engine.
    • When you spray it, the coolant evaporates, taking with it the latent heat of the water and the hot air around it.
    • Because liquid coolants are prohibited in Formula 1, the only means of keeping the temperature down is the air streaming through the brake cooling vents.


1930s: from cool, on the pattern of lubricant.

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Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
elaborate ornamentation of a vocal melody