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

Historical shocks have prompted similar responses: the Great Fire of London led to fire codes and insurance pools, while 19th-century boiler explosions catalyzed modern engineering standards. —Felicia Jackson, Forbes.com, 23 June 2025

Rules included which circumstances tenants could use outdoor access to the gate, which plants should be watered on which days and asked tenants to top up boiler pressure in the attic every 5-6 days. —Alice Gibbs, MSNBC Newsweek, 18 June 2025

Mark Jordan, the chief boiler inspector for the Kentucky Department of Housing, Building and Construction's Boiler Inspection Section, found the vessel that caused the explosion was installed without a permit and was never inspected on-site, The Courier Journal previously reported. —Killian Baarlaer, Louisville Courier Journal, 17 June 2025

That dynamic has led to contentious votes on matters ranging from personnel issues to boiler maintenance. —Nell Salzman, Chicago Tribune, 28 May 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