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.
History shows that Sirianni has every reason to sit on the hot seat unless the Eagles somehow get on one heck of a heater. — CBS News, 2 Nov. 2026 Butner recently installed a new hot water heater and dishwasher and replaced the flooring in hopes of making the property more attractive. — Alex Veiga, Los Angeles Times, 28 Oct. 2026 The brand's new Bitwater replaces the lower water heater element in your existing tank. — Abhimanyu Ghoshal, New Atlas, 27 Oct. 2026 Butner recently installed a new hot water heater and dishwasher, and replaced the flooring in hopes of making the property more attractive. — Arkansas Online, 26 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

Browse Nearby Words

Cite this Entry

“Heater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heater. Accessed 6 Nov. 2026.

Kids Definition

: a device that heats or holds something to be heated
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