in·su·la·tion | \ ˌin(t)-sə-ˈlā-shən \

Definition of insulation 

1a : the action of insulating

b : the state of being insulated

2 : material used in insulating

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Examples of insulation in a Sentence

These materials provide the insulation needed in cold weather. she had grown up in such rural insulation that she'd never met anyone of a different race

Recent Examples on the Web

Two fans keep air flowing, extra insulation traps in heat during extreme cold, and a central command center controls the mechanicals, hot water, 200 watts of solar, 2,000-watt inverter, and the Espar hydronic diesel heater. Megan Barber, Curbed, "This custom camper van can sleep a family of 6," 11 July 2018 When the museum vacated the warehouse, the building was transformed into a cold storage unit, and aluminum insulation panels covered the mural in 1989. Annalisa Quinn, New York Times, "Keith Haring Mural in Amsterdam Is Uncovered After Nearly 30 Years," 26 June 2018 Another cosplayer pet Kevin, the tropical bird from the movie that Russell – also known as Steve Gonzales – made out of a pool noodle and insulation foam. Kellen Browning, sacbee, "'Getting our geek on': Fandemic Tour draws thousands of cosplayers, comic book lovers," 23 June 2018 Bond glue, insulation spray and a lot of sanding made the rounder shape. Alec Johnson, Milwaukee Journal Sentinel, "A robot built by Arrowhead students is throwing out the first pitch at the June 15 Brewers game," 15 June 2018 Investigators found serious deficiencies in the insulation certification process and manufacturing. John Cox, USA TODAY, "Accidents that changed aviation: Controlling in-flight fires," 10 June 2018 According to a Vertex asbestos air-monitoring report, dated Feb. 12, pipe insulation was removed, using precautions required by law to contain asbestos fibers. Wendy Ruderman,, "New test: 10.7 million asbestos fibers on floor at Philadelphia elementary school," 6 June 2018 Water heaters should be set to 120 degrees, and an insulation blanket can conserve some of that heat. Greg Larose,, "Entergy warns customers with tips to avoid high bills in hot weather," 5 June 2018 To do this, Silverman tested several fabrics and decided upon an insulation material comprised of recycled cotton and jute, a rough fiber similar to twine or rope. Kristen A. Schmitt, Smithsonian, "Are These Baked Mushroom Sandals the Future of Fashion?," 23 May 2018

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

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First Known Use of insulation

1798, in the meaning defined at sense 1a

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Last Updated

10 Sep 2018

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Time Traveler for insulation

The first known use of insulation was in 1798

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More Definitions for insulation



English Language Learners Definition of insulation

: a material or substance that is used to stop heat, electricity, or sound from going into or out of something : a material that insulates something

: the quality or state of being insulated

: the act of insulating something


in·su·la·tion | \ ˌin-sə-ˈlā-shən \

Kids Definition of insulation

1 : material that is used to stop the passage of electricity, heat, or sound from one conductor to another

2 : the act of insulating : the state of being insulated insulation of wires


in·su·la·tion | \ ˌin(t)-sə-ˈlā-shən \

Medical Definition of insulation 

1 : the action of separating a conductor from conducting bodies by means of nonconductors so as to prevent transfer of electricity, heat, or sound also : the state resulting from such action

2 : material used to provide insulation

Other words from insulation

insulate \ˈin(t)-sə-ˌlāt \ transitive verb insulated; insulating

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Comments on insulation

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


occurring twice a year or every two years

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