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 disease does not generally spread from person to person, but infections can occur if the bacteria get into a building's water supply, including in shower heads, sink faucets, hot water tanks, heaters, cooling towers and other plumbing systems. Mary Kekatos, ABC News, 7 July 2026 Includes heater, air conditioning, external shower, stargazer window and off-road tires. Kris Millgate, USA Today, 1 July 2026 Few arms, of course, can sustain 102 mph heaters and high-spin sliders on a starter’s workload. Spencer Nusbaum, New York Times, 1 July 2026 Ellison, who is fifty-five, was slouched behind the wheel with the heater blowing on him. Burkhard Bilger, New Yorker, 29 June 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 7 Jul. 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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