boiler

noun

boil·​er ˈbȯi-lər 

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

The additional funds will be used to support the maintenance and purchase of new boilers, irrigation and surveillance systems, water storage, communications systems, emergency management software, and firefighting equipment. —Francesca Aton For Artnews, Robb Report, 3 Apr. 2025

Emerson Sensi Touch 2 Smart Thermostat 24v compatible, boiler, heat pump, air conditioner, furnace, Alexa, Google Assistant, SmartThings $169.99 at Best Buy $209.99 Save $40.00 Get Deal The next-generation Sensi Touch is also on sale right now. —K. Thor Jensen, PCMAG, 15 Mar. 2025

But, as much as 44 per cent of that heat is low temperature (<80°C to 150°C); and is often provided by boilers, dryers, and other equipment that can be replaced by heat pump technology that is available today. —Nick Nuttall, Forbes, 10 Mar. 2025

Our top espresso machine pick, for instance, takes at least 20 minutes to stabilize the temperature in its boilers. —Alaina Chou, Bon Appétit, 19 Feb. 2025

Word History

First Known Use

circa 1540, in the meaning defined at sense 1

Phrases Containing boiler

• boiler room
• double boiler
• steam boiler

Rhymes for boiler

• broiler
• oiler
• spoiler
• toiler
• reboiler

Kids Definition

boiler

noun

boil·​er ˈbȯi-lər 

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