radiator

noun

ra·​di·​a·​tor ˈrā-dē-ˌā-tər How to pronounce radiator (audio)
dialectal ˈra-
: one that radiates: such as
a
: 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
b
: a transmitting antenna

Examples of radiator in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Securing a durable, palm-sized speaker equipped with dual passive bass radiators, USB-C water protection alerts, and app EQ customization under $90 is a fantastic value. — Juhi Wadia, PC Magazine, 31 July 2026 Their next major undertaking is installing an outdoor wood boiler system and radiators throughout the house, which currently doesn’t have a furnace. — Ashley Vega, PEOPLE, 24 July 2026 Slash-cut vents at the top of the fenders reduce pressure inside the arches and increase airflow through the radiators. — Tim Pitt, Robb Report, 22 July 2026 Avoid placing plants directly near heating vents, beside radiators, or against cold window glass, where extreme temperature swings can stress foliage. — Colleen Sullivan, Martha Stewart, 21 July 2026 See All Example Sentences for radiator

Word History

First Known Use

1836, in the meaning defined above

Time Traveler
The first known use of radiator was in 1836

Rhymes for radiator

See All Rhymes for radiator

Browse Nearby Words

radiative
radiator
radiatory
See all Nearby Words

Cite this Entry

“Radiator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiator. Accessed 13 Aug. 2026.

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Kids Definition

radiator

noun
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

Nglish: Translation of radiator for Spanish Speakers

Britannica.com: Encyclopedia article about radiator

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