boiler

noun

boil·​er ˈbȯi-lər How to pronounce boiler (audio)
1
: one that boils
2
a
: a vessel used for boiling
b
: the part of a steam generator in which water is converted into steam and which consists usually of metal shells and tubes
c
: a tank in which water is heated or hot water is stored
d
chiefly British : furnace

Examples of boiler 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.
Evidence on the wreck indicates that the boilers were still running — and still being fed — up to the moment the ship split in two. Jordan Runtagh, People.com, 6 July 2025 Since their formation a decade ago, the group has helped enact policies that have replaced nearly 10,000 coal boilers across the city. Cecilia Rodriguez, Forbes.com, 29 June 2025 Since its formation a decade ago, the group has helped enact policies that have replaced nearly 10,000 coal boilers across the city. Skylar Knight, Smithsonian Magazine, 27 June 2025 The company produces home appliances, including gas boilers and heat pumps. Emily Feng, NPR, 27 May 2025 See All Example Sentences for boiler

Word History

First Known Use

circa 1540, in the meaning defined at sense 1

Time Traveler
The first known use of boiler was circa 1540

Cite this Entry

“Boiler.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/boiler. Accessed 21 Jul. 2025.

Kids Definition

boiler

noun
boil·​er ˈbȯi-lər How to pronounce boiler (audio)
1
: a container in which something is boiled
2
: a strong metal container used in making steam
3
: a tank in which water is heated or hot water is stored

More from Merriam-Webster on boiler

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