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.
In the seventh inning, Wacha used the heater to avoid potential trouble. Kansas City Star, 23 June 2026 The rest of the money went to the addition of a pool heater at the Titusville YMCA Family Center, which will allow the pool to stay open year-round, providing swim lessons, family activities and programs for people living with Alzheimer's and their caregivers — no matter the season. Kimberlee Speakman, PEOPLE, 23 June 2026 For extra insurance, turn on your heaters, a de-humidifier, or a fan. Mary Catherine McAnnally Scott, Southern Living, 22 June 2026 At one point, Bob Feller’s heater proved to be faster than a racing motorcycle. Bernie Pleskoff, Forbes.com, 19 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

Browse Nearby Words

Cite this Entry

“Heater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heater. Accessed 29 Jun. 2026.

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

Love words? Need even more definitions?

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

More from Merriam-Webster