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

The chaos was reportedly so loud that a night shift manager at the palace thought a boiler had exploded. —Brian Niemietz, New York Daily News, 26 Feb. 2025

The plant was built at a time when capturing solar energy with a complex array of mirrors and boilers was one of several ideas being tested. —Elizabeth Weise, USA TODAY, 16 Feb. 2025

While emerging technologies will no doubt aid in the transition away from fossil fuels, established technologies such as heat pump plants, electric boilers, and solar photovoltaics and thermal can be used in a multi-phased approach to decarbonize the UCSD campus in the next decade. —Ainsley Bock, San Diego Union-Tribune, 18 Feb. 2025

An ultra-modern mansion in Franklin Hills prioritizes those eco-conscious incentives as well, with solar panels, a geothermal heating system, and a high-efficiency gas boiler back-up that produces fewer emissions for a smaller energy-use footprint. —Demetrius Simms, Robb Report, 30 Jan. 2025

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