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.
Two dead roaches were found, one under a hot water heater, the other under a shelf with tortilla chips. — David J. Neal, Miami Herald, 2 Oct. 2026 Quarterback Malik Willis will present some challenges, but the Dolphins face a tall task with Minnesota’s defense on a heater. — Jon Krawczynski, New York Times, 2 Oct. 2026 In a sauna, dismantling a cabin because a control or heater needs replacement would be a poor outcome. — Christopher Kiggins, Forbes.com, 29 Sep. 2026 The heater should pair well with his signature sinker, curveball and slider. — Kansas City Star, 24 Sep. 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 9 Oct. 2026.

Kids Definition

: a device that heats or holds something to be heated
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