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

This research supports the advancement of X-point radiator (XPR) regimes, a promising operating mode for future fusion power plants. —Aman Tripathi, Interesting Engineering, 22 Nov. 2025

Eliminate air from hot water radiators. —Phaedra Trethan, USA Today, 22 Nov. 2025

The market has welcomed a raft of new portable propane fire pits, torches and radiators in recent years, but many of them weigh more than a tent on their own, then hook up to a home BBQ-style 20-lb propane tank. —New Atlas, 10 Nov. 2025

Bleeding radiators ensures even heat distribution and improves the overall efficiency of your heating system. —Melissa Fleur Afshar, MSNBC Newsweek, 10 Nov. 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