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
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The small heater also has several safety features, including tip-over protection and a cool-to-touch body. Sian Babish, PEOPLE, 1 Feb. 2026 Along Las Olas in Fort Lauderdale, restaurants brought out heaters for outside diners. Cindy Krischer Goodman, Sun Sentinel, 1 Feb. 2026 Ensure portable heaters are used correctly. Nc Weather Bot, Charlotte Observer, 1 Feb. 2026 The digital display automatically rotates when the heater is used horizontally, a small but thoughtful touch for its dual-orientation concept. Daniel Fusch, USA Today, 31 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 10 Feb. 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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