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

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

That was my insight, or more, my instinct, after interviewing Kenny Young, the CEO and seven-year veteran of Babcock & Wilcox , the 160-year-old boiler manufacturer turned engineering and construction company. —Jim Cramer, CNBC, 17 May 2026

The hotel has strong eco credentials, employing solar panels, biomass boilers, rainwater-harvesting, and gray water recycling—and a delightful ten-percent discount for guests arriving by foot, bike, or public transport. —Condé Nast, Condé Nast Traveler, 16 May 2026

Here’s just one thing from my boiler manual. —Tim Carter, Hartford Courant, 16 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