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

Testing of membrane Membranes promise a cleaner, low-energy alternative to massive boilers. — Mrigakshi Dixit, Interesting Engineering, 18 June 2026

Gifford, who never attended college, eventually sold those buildings and became the city’s foremost expert on the repair and maintenance of boilers, writing a 571-page textbook on building science. — Jesse Armas, Curbed, 16 June 2026

Other projects at Capital High include a boiler replacement, which involves asbestos abatement and demolishing the old boiler, and installing new bleachers in its auxiliary gym. — Becca Savransky, Idaho Statesman, 9 June 2026

The complaint alleges that the defendants conducted a telemarketing scheme using boiler-room techniques to defraud victims in search of health insurance. — Angie Dimichele, Sun Sentinel, 8 June 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