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

Discolored Leaves Leaves that have started to turn brown or yellow may be dehydrated due to moisture loss from heater damage. —Heather Bien, The Spruce, 19 Jan. 2026

Electrification — or gas heaters, stoves and other appliances moving to electric ones — is also a factor, said Ramteen Sioshansi, a professor of engineering at Carnegie Mellon University who studies the electricity industry. —Robert Ferris, CNBC, 15 Jan. 2026

The Bears held just a walkthrough on Wednesday, surely with no heaters on the sideline, which is apparently the way Ben Johnson likes it. —Matt Zahn, CBS News, 15 Jan. 2026

Placing your carbon monoxide detector in the proper location can alert you to dangerous levels of the invisible gas, which is unfortunately more likely to occur with the use of personal space heaters. —Shivani Vyas, Better Homes & Gardens, 14 Jan. 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