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.
It's also suggested to leave cabinet doors open, allowing air from the home heater to warm the faucets. Isa Almeida, Oklahoman, 27 Jan. 2026 An example is a California business that installs temporary hot water heaters in emergencies to give homeowners time to consider switching to a heat pump water heater. Judith Kohler, Denver Post, 26 Jan. 2026 Ensure portable heaters are used correctly. Nc Weather Bot, Charlotte Observer, 26 Jan. 2026 Henry is also on a touchdown heater. Josh Shepardson, Forbes.com, 24 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 3 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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