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.
The parcel comes with seven apartments, and the buildings have undergone capital improvements in recent years, including new boilers and electrical upgrades. Clio Chang, Curbed, 15 Oct. 2025 Those preparatory projects included the installation of new capping roofs to weatherproof the buildings for a long period of care and maintenance, as well as the rerouting of electrical supplies and de-planting of boiler equipment. Aman Tripathi, Interesting Engineering, 8 Oct. 2025 Money pledged by the administration to refurbish older plants will not go very far given that a single boiler component at a plant can cost $25 million to replace, said Nikhil Kumar with GridLab, an energy consulting group. Jordan Blum, Fortune, 4 Oct. 2025 Because the attack came at the end of the war, and the U-boat had not received orders of any surrender, the sinking of the Eagle was reported as an engineering and boiler failure rather than an escalatory attack from a foreign adversary. Leanna Renee Hieber, Big Think, 2 Oct. 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 23 Oct. 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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