heater

noun

heat·​er ˈhē-tər 

1

: one that heats

especially : a device that imparts heat or holds something to be heated

2

: fastball

Examples of heater in a Sentence

Recent Examples on the Web

After nearly five decades in space, engineers have had to steadily power down heaters and instruments while making sure the spacecraft do not get so cold that key systems, including fuel lines, are put at risk. —Eric MacK, FOXNews.com, 21 Apr. 2026

Khan said that the building forced tenants to rely on their own portable electric heaters plugged into unreliable electrical wiring, which created fire hazards. —Nikki Dementri, CBS News, 20 Apr. 2026

The heater-cooler device used in Nolte’s surgery hadn’t been disinfected in five months. —Judy L. Thomas, Kansas City Star, 20 Apr. 2026

If the engine reaches normal operating temperature and the heater hoses are hot going into and coming out of the heater core, then the issue is most likely with the blend door system. —Hartford Courant, 19 Apr. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing heater

• immersion heater
• quartz heater
• space heater
• water heater

Rhymes for heater

• beater
• cheater
• dieter
• eater
• liter
• litre
• meter
• metre
• neater
• praetor
• seater
• skeeter

Kids Definition

heater

noun

heat·​er ˈhēt-ər 

: a device that heats or holds something to be heated