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.
At the time of Nolte’s March 2019 surgery, the heater-cooler unit hadn’t been disinfected in five months. Judy L. Thomas, Kansas City Star, 29 Apr. 2026 Each of the hotel’s restaurants offers outdoor dining areas with heaters to warm up even the chilliest evenings. Condé Nast, Condé Nast Traveler, 27 Apr. 2026 With Jermaine Dupri on the beat and Sean Don on rap duty, Kehlani offers another brilliant bedroom heater. Adelle Platon, VIBE.com, 27 Apr. 2026 The facility purchased space heaters but the heaters tripped a fuse and shut down, leaving the sloths alone without heat for at least one night. CBS News, 27 Apr. 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 1 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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