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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Jones had to move the more weather-sensitive crops inside, however, with a heater to keep them warm. ABC News, 6 May 2026 Under rules adopted in 2023, only zero-nitrogen oxide water heaters would be sold starting in 2027, followed by air heaters in 2029 and larger commercial systems in 2031. Kenny Choi, CBS News, 5 May 2026 However, if there is an actual issue—such as a faulty oxygen sensor heater—clearing the code only turns off the light temporarily without fixing the problem. Hartford Courant, 3 May 2026 The heater registered 27 swings and eight whiffs, per Statcast. Jaylon Thompson, Kansas City Star, 2 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 9 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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