ra·​di·​a·​tor ˈrā-dē-ˌā-tər How to pronounce radiator (audio)
 dialectal  ˈra-
: one that radiates: such as
: any of various devices (such as a series of pipes or tubes) for transferring heat from a fluid within to an area or object outside
: a transmitting antenna

Example Sentences

Recent Examples on the Web The booklet spends about seven pages detailing the crankshaft and 10-cylinder engine with exhaust and radiator details, though there is no working suspension. Sal Vaglica, Car and Driver, 21 Jan. 2023 The punctured coolant line on an external radiator of the MS-22 was possibly caused by a micrometeoroid or space debris. PCMAG, 30 Dec. 2022 As Roscosmos indicated earlier this week, the impressive-looking plume of material originated from a millimeter-sized hole in a coolant radiator. John Timmer, Ars Technica, 22 Dec. 2022 At the back, there’s a massive rear-mount radiator along with the 32-inch spare tire. Matt Crisara, Popular Mechanics, 1 Dec. 2022 Any fix at hand served to keep their planes in the air—cornmeal could plug a leaking radiator—or on the ground, as when one crew member leapt off his plane and dragged his boots in the earth to help slow it to a stop. Michael O’donnell, WSJ, 18 Nov. 2022 This is something like your car’s radiator, which moves heat out by sending coolant around the engine and bringing it to the front to cool down again. Erik Klemetti, Discover Magazine, 31 Aug. 2017 The ethylene glycol in your radiator is quite toxic if ingested. Ray Magliozzi, San Diego Union-Tribune, 9 Oct. 2022 Known for shooting with her beloved Land Camera 250, Smith started posting images from her phone including portraits of her kids, her radiator, her boots, and her Abyssinian cat, Cairo. Jonathan Cohen, SPIN, 5 Oct. 2022 See More

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

Word History

First Known Use

1836, in the meaning defined above

Time Traveler
The first known use of radiator was in 1836

Dictionary Entries Near radiator

Cite this Entry

“Radiator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiator. Accessed 29 Jan. 2023.

Kids Definition


ra·​di·​a·​tor ˈrād-ē-ˌāt-ər How to pronounce radiator (audio)
: one that radiates
especially : any of various devices (as a set of pipes or tubes) for transferring heat from a fluid within to an area or object outside

More from Merriam-Webster on radiator

Last Updated: - Updated example sentences
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