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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Hot water heaters at the establishment were not reaching the correct temperature. Lillie Davidson, Fort Worth Star-Telegram, 3 June 2026 Wembanyama opened on a heater — 31 points in less than 24 minutes, 10-of-12 from the field — but left in the fourth quarter due to knee hyperextension. Esfandiar Baraheni, New York Times, 3 June 2026 The Cougars then went on a heater, winning four straight in the Division 1 playoffs. John Maffei, San Diego Union-Tribune, 1 June 2026 Lueck was sitting on a heater, and did not miss, lining a shot to right field. Troy Renck, Denver Post, 31 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

Browse Nearby Words

Cite this Entry

“Heater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heater. Accessed 8 Jun. 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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