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.
Add De-Icer to the Water To stop the water in your bird bath from freezing, place a simple immersion-style heater made specifically for bird baths in the water. Rita Pelczar, Better Homes & Gardens, 7 Jan. 2026 Add the organization’s decision to sell high on Tristan Jarry midseason, and Dubas has been on a heater of excellent moves over the last several months. Harman Dayal, New York Times, 7 Jan. 2026 Applicants must not have previously received a blanket or heater from MLGW. Jack Armstrong, Memphis Commercial Appeal, 6 Jan. 2026 McCall’s banner also appears to cleverly usurp and subvert the aesthetics of European heraldry—indeed, its elegant design would look utterly correct on a beret, a medal, or a heater shield. Alex Jovanovich, Artforum, 1 Jan. 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 11 Jan. 2026.

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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