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

Water tanks, boilers and pipework are among the items being replaced. — Jennifer Hassan, USA Today, 26 June 2026

The alternative could be an increasing number of buildings falling into disrepair, as owners are forced to choose between the tax bill and a new boiler or roof. — Howard Husock, New York Daily News, 27 June 2026

Contreras has always been an overheating boiler of a ballplayer, with a history of arguing with umpires, throwing bats and helmets, and willing to charge the mound over any slight, real or imagined. — Steve Buckley, New York Times, 2 July 2026

Set in an alternate past during Japan's Meiji era, the world of Sparks of Tomorrow is totally reliant on steam power, with massive boilers constantly puffing away. — K. Thor Jensen, PC Magazine, 3 July 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