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.
Engineers typically fight it with heaters, reverse-cycle defrosting, or glycol sprays. Tejasri Gururaj, Interesting Engineering, 30 Dec. 2025 Plus, my house was so dry from the heater being turned on higher than usual. Euna Park, Southern Living, 29 Dec. 2025 Inside the home proper, its main living area is finished in pine tongue and groove and heated with a mini-split air-conditioning unit (there are also electric heaters spread throughout). New Atlas, 29 Dec. 2025 Enjoy your patio space all year-long with deals on clever heaters, including a Cuisinart tabletop heater for under $100. Paige Bennett, Better Homes & Gardens, 27 Dec. 2025 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 31 Dec. 2025.

Kids Definition

heater

noun
heat·​er ˈhēt-ər How to pronounce heater (audio)
: a device that heats or holds something to be heated

More from Merriam-Webster on heater

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!