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

Like much of the Railyards, the boiler and erecting shop buildings have long needed attention. — Graham Womack, Sacbee.com, 22 Aug. 2026

Natural gas is deeply embedded upstream in textile manufacturing, supplying captive electricity generation as well as the boilers and steam required for processes including dyeing, washing, drying and finishing. — Alexandra Harrell, Footwear News, 19 Aug. 2026

Staff in the South Stand offices would spend the winter months wearing jackets due to a broken boiler and, according to Bruce, only the players quickest to the dressing-room showers could expect to enjoy hot water after games. — Philip Buckingham, New York Times, 14 Aug. 2026

Thanks to this year’s record heat waves in Europe, daily energy consumption rose about 30%, forcing the bank to upgrade cooling systems and boilers, add insulation, and expand renewable power generation. — Catherina Gioino, Fortune, 10 Aug. 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