radiator
noun
ra·di·a·tor
ˈrā-dē-ˌā-tər 
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
If there are no major issues then replace the drive belts, radiator and heater hoses and give the radiator a good look.
—
John Paul Senior Manager Public Affairs and Traffic Safety Aaa Northeast, Hartford Courant, 10 Jan. 2026
Ensure that all supply and return vents are clear of furniture and radiators are given space to function properly.
—Louise Parks, Martha Stewart, 10 Jan. 2026
Important bits like the fuel tank, battery, and radiator are encased in kevlar.
—Erik Shilling, Robb Report, 8 Jan. 2026
O'Connor recommends hanging them indoors near a heat vent or radiator (of course, abide by fire safety rules).
—Kate Van Pelt, The Spruce, 5 Jan. 2026
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Cite this Entry
“Radiator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiator. Accessed 20 Jan. 2026.
Kids Definition
radiator
noun
ra·di·a·tor
ˈrād-ē-ˌāt-ər
: 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
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