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

To comply with the regulations, many building owners will have to replace existing fossil fuel appliances, such as gas furnaces and boilers, with electric alternatives, such as heat pumps and water heaters. —Christine Condon, Baltimore Sun, 15 Jan. 2025

As the winter brings cold temperatures, owners should consider heating conservation measures such as high efficiency furnaces or boilers, programmable thermostats, heat pumps, and adding weather stripping around doors and windows. —Charles Marshall, Forbes, 7 Jan. 2025

And heat pumps are highly efficient, which means less electricity is needed to use them than traditional heating systems like fossil fuel furnaces and boilers. —Julia Simon, NPR, 25 Dec. 2024

Related Articles Minimalist and utilitarian styles like jumpsuits, boiler suits and coveralls have been enduring staples in Handler’s wardrobe throughout her career. —Maggie Clancy, WWD, 2 Dec. 2024

Word History

First Known Use

circa 1540, in the meaning defined at sense 1

Phrases Containing boiler

• boiler room
• double boiler
• steam boiler

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