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.
Building failures, from malfunctioning boilers and coolers to plumbing and roof leaks, are increasingly occurring, some of them during high-profile medical and tech conventions, the most recent just a couple of months ago. Lori Weisberg, San Diego Union-Tribune, 25 May 2025 The tugboat got new boilers and was renamed the J.C. Ames. Sarah Kuta, Smithsonian Magazine, 23 May 2025 That was nearly half the cost of using all-electric boilers and about one-third less than the cost of geothermal. John Moritz, Hartford Courant, 30 Apr. 2025 For example, the U.S. imports $124 billion in electric machinery; $82 billion in nuclear reactors, boilers and other machinery; $12 billion in goods made of iron or steel; and $19.3 billion in plastics from China each year, according to data from the International Trade Administration. Anne Marie D. Lee, CBS News, 6 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 5 Jun. 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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