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

By my bedroom window, the radiator was puffing hot air. —Shafiq Najib, ABC News, 7 Apr. 2026

That includes the mudguard, tank cover, radiator cover, sprocket cover, heel guards, handlebar splash guards, seat base, intake duct, number plate holder, and rear seat cover. —New Atlas, 4 Apr. 2026

So in addition to solar panels, an AI satellite would need another set of large radiators. —Geoff Brumfiel, NPR, 3 Apr. 2026

Faux-chrome hubcaps and brick outlines resembling fenders decorate the building’s skin; those giant gargoyles on the corners are overscale replicas of radiator-cap hood ornaments. —Christopher Bonanos, Curbed, 27 Mar. 2026

Word History

First Known Use

1836, in the meaning defined above

Rhymes for radiator

• activator
• actuator
• agitator
• alligator
• allocator
• alternator
• animator
• annotator
• applicator
• arbitrator
• aspirator
• aviator

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