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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
After a foul ball, Chapman exacted some revenge, striking out Devers on a 102 MPH heater up in the zone. Dan Freedman, Forbes.com, 22 June 2025 That’s when the club pushed more velocity at Alvarez in the cage and during batting practice, to get him more on time for the heater. Tim Britton, New York Times, 19 June 2025 The Red Sox ace finished the at bat with his two hardest pitches of the season to that point, including a 99 mph heater that got Judge swinging. Mac Cerullo, Boston Herald, 14 June 2025 Inside, the van still has its original, gorgeous oak cabinets, plus a stove, sink, heater, and bed. Jakob Schiller, Outside Online, 29 May 2025 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 5 Jul. 2025.

Kids Definition

heater

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

More from Merriam-Webster on heater

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