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

One of those decisions was the booster boiler. —Esha Chhabra, Forbes.com, 27 May 2026

There, the heat is transferred to steam that powers boilers, distillers and other machinery used in production of ethanol and a host of other byproducts generated at the POET plant. —Bart Pfankuch, South Dakota News Watch, 21 May 2026

There, the heat is transferred to steam that powers boilers, distillers and other machinery used in production of ethanol and a host of other byproducts generated at the POET plant. —CBS News, 20 May 2026

Rusty electrical panels and a boiler installed without a permit. —Taylor O'Connor, Kansas City Star, 18 May 2026

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