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

Students could be exposed to asbestos in older buildings if pipes, boilers or ducts are not properly maintained. — Rebecca Smullin Dawson, The Conversation, 25 Sep. 2026

These devices temperature sensors coupled with adaptive algorithms to adjust your furnace, boiler, heat pump, or other HVAC system, lowering your power costs and maintaining an ideal climate. — K. Thor Jensen, PC Magazine, 22 Sep. 2026

While low-hanging fixes such as efficiency improvements can be self-funded through short-term debt, major infrastructure upgrades like industrial heat pumps or electric boilers require payback periods of five to 10-plus years. — Jasmin Malik Chua, Footwear News, 16 Sep. 2026

The Greek Revival-style apartment house has been vacant since 2017, when all of its tenants left, reportedly due to a broken boiler that was never repaired. — Jc Reindl, Freep.com, 11 Sep. 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