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
: fastball

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.
With California phasing out new natural gas heaters, Pacific Gas and Electric says customers can save an average of $714 per year by switching from gas to heat pump technology. — Molly McCrea, CBS News, 16 Oct. 2026 Small heaters could bring the batteries back to operating temperature when power is needed, rather than keeping them warm throughout the lunar night. — Neetika Walter, Interesting Engineering, 14 Oct. 2026 Its sauna area fits up to four adults and has an electric sauna heater, while its plunge pool fits up to six adults. — New Atlas, 11 Oct. 2026 It is equipped with air conditioning and a heater, and skylights were added during a recent renovation. — Rebecca Flint Marx, New York Times, 10 Oct. 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

Phrases Containing heater

Rhymes for heater

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Browse Nearby Words

heat equator
heater
heater car
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Cite this Entry

“Heater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heater. Accessed 27 Oct. 2026.

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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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