cool·​ant | \ ˈkü-lənt How to pronounce coolant (audio) \

Definition of coolant

: a usually fluid cooling agent

Examples of coolant in a Sentence

Recent Examples on the Web

My 2012 Toyota Corolla’s coolant has been checked but never changed. Bob Weber,, "Does shutting off accessories before shutting off engine preserve the battery?," 13 Jan. 2018 Problem: Antifreeze not living up to its name Engine coolant, a.k.a. David Muller, Car and Driver, "How Severe Cold Affects Your Car (and What to Do about It)," 5 Jan. 2018 Extra bottles of coolant, oil and transmission fluid are also a good idea. Crystal Paul, The Seattle Times, "6 safety tips for a solo road trip," 3 Aug. 2018 That means coolant can't flow directly over the magnets to cool them. Matthew Jancer, Popular Mechanics, "Speaking of Spokes: The Design That Could Change How Electric Car Motors Are Made," 20 Nov. 2018 The company has identified the cause of the engine fires as leaks of glycol coolant in their exhaust gas recirculation (EGR) coolers. Kim Tong-hyung, The Seattle Times, "South Korea bans driving BMWs under recall due to fires," 14 Aug. 2018 Instead of using air conditioning to keep equipment cool, the company immerses custom ASIC boards in 3M Novec, a fluorochemical coolant. Madeleine Rivera, Fox News, "Large-scale crypto mining operation launched in Lone Star State," 20 Aug. 2018 Don't just drain-and-replace coolant, power steering fluid, and brake system fluid. Matt Jancer, Popular Mechanics, "How To Resurrect a Sleeping Car," 7 Feb. 2018 Likely Cause: There’s a leak somewhere in your coolant system. Popular Mechanics, "The Lightning-Fast Guide to Figuring Out What's Wrong With Your Car," 21 Nov. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coolant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of coolant

1915, in the meaning defined above

History and Etymology for coolant

cool entry 2 + -ant entry 1

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Dictionary Entries near coolant





cool bath

cool beans

cool/calm head

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Time Traveler for coolant

The first known use of coolant was in 1915

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English Language Learners Definition of coolant

: a liquid that is used to cool an engine or machine

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More from Merriam-Webster on coolant

Spanish Central: Translation of coolant

Nglish: Translation of coolant for Spanish Speakers

Britannica English: Translation of coolant for Arabic Speakers Encyclopedia article about coolant

Comments on coolant

What made you want to look up coolant? Please tell us where you read or heard it (including the quote, if possible).


a sum of money that is sent as a payment

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