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

Avoid opening the radiator cap immediately: Wait until the engine cools to prevent burns. —Bethany Wales, Sacbee.com, 30 June 2025

Then there are the two new heat exchangers up front that boost the total radiator count to 15. —Lawrence Ulrich, Robb Report, 25 June 2025

Its eight radiators handle everything from high and low-temp loops to oil cooling – which is how Bugatti cools the Tourbillon's batteries that power its three identically spec'd electric motors. —New Atlas, 23 June 2025

John’s room has a window unit, a fan, and a radiator. —Adriane Quinlan, Curbed, 16 June 2025

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