heater

noun

heat·​er ˈhē-tər How to pronounce heater (audio)
1
: one that heats
especially : a device that imparts heat or holds something to be heated
2

Examples of heater in a Sentence

Recent Examples on the Web
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Not one but two heaters; one wall mounted right next to the bed and one electric fur rug for under foot comfort. Condé Nast, Condé Nast Traveler, 21 May 2026 Cale or no Cale, Mitch Marner is on a serious heater right now. Beth Rankin, Denver Post, 20 May 2026 Use electric stoves and heaters when possible instead of gas or wood-burning options. Ryan Brennan may 19, Miami Herald, 19 May 2026 An additional lawsuit was filed in January in federal court in Kansas City, Kansas, against LivaNova and an employee at The University of Kansas Hospital called a perfusionist, who was in charge of the heater-cooler device during the surgery of a patient who later died. Judy L. Thomas, Kansas City Star, 19 May 2026 See All Example Sentences for heater

Word History

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of heater was in the 15th century

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Cite this Entry

“Heater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heater. Accessed 21 May. 2026.

Kids Definition

heater

noun
heat·​er ˈhēt-ər How to pronounce heater (audio)
: a device that heats or holds something to be heated

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