boil·​er | \ ˈbȯi-lər \

Definition of boiler

1 : one that boils
2a : 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

All County’s ostensible purpose was to be the purchasing agent for Fred Trump’s buildings, buying everything from boilers to cleaning supplies. Matthew Yglesias, Vox, "Seriously, we need to see Donald Trump’s tax returns," 3 Oct. 2018 Under the deal, the private developers will take over the management of the properties and invest $90 million in renovating them, including replacing windows and boilers and giving residents new kitchens and bathrooms. Laura Kusisto, WSJ, "City Nears Deal to Sell Stake in Two Public-Housing Complexes," 27 Dec. 2018 One reason for the slowdown, scientists say, is additional pollutants from sources such as industrial, residential, and commercial boilers and off-road vehicles. Doyle Rice, USA TODAY, "The USA's long battle against air pollution isn't over yet, as air quality improvements are slowing down," 30 Apr. 2018 Here’s how: Turn the thermostat all the way down to prevent the boiler from cranking up. Joseph Truini, Popular Mechanics, "How to Silence a Noisy Steam Radiator," 11 Dec. 2018 Forget the baggy, loose mechanic’s boiler suit: in New York City last night for her beau Travis Scott’s concert, Kylie Jenner put a whole new va-va-voom spin on the look. Liana Satenstein, Vogue, "Kylie Jenner Puts a Bombshell Spin on the Jumpsuit," 30 Nov. 2018 All County’s owners devised another ruse to profit off Eastmond’s boilers. Susanne Craig, The Seattle Times, "Trump engaged in suspect tax schemes as he reaped riches from father," 2 Oct. 2018 Eastmond is the owner of A.L. Eastmond & Sons, a Bronx company that makes industrial boilers. Susanne Craig, The Seattle Times, "Trump engaged in suspect tax schemes as he reaped riches from father," 2 Oct. 2018 Researchers attributed the discrepancy to emissions from sources including boilers and off-road vehicles, which had slipped under the radar as regulators focused on curbing pollution from power plants and cars. Sara Sneath,, "Wild otter caught on video eating at Barataria Preserve," 1 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boiler.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of boiler

circa 1540, in the meaning defined at sense 1

Keep scrolling for more

Learn More about boiler

Statistics for boiler

Last Updated

16 Jan 2019

Look-up Popularity

Time Traveler for boiler

The first known use of boiler was circa 1540

See more words from the same year

Keep scrolling for more

More Definitions for boiler



English Language Learners Definition of boiler

: a large container in which water is heated to produce steam in an engine


boil·​er | \ ˈbȯi-lər \

Kids Definition of boiler

1 : a container in which something is boiled
2 : a tank heating and holding water
3 : a strong metal container used in making steam (as to heat buildings)

Keep scrolling for more

More from Merriam-Webster on boiler

Rhyming Dictionary: Words that rhyme with boiler

Spanish Central: Translation of boiler

Nglish: Translation of boiler for Spanish Speakers

Britannica English: Translation of boiler for Arabic Speakers Encyclopedia article about boiler

Comments on boiler

What made you want to look up boiler? Please tell us where you read or heard it (including the quote, if possible).


someone who never drinks alcohol

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!