in·​su·​la·​tion | \ ˌin(t)-sə-ˈlā-shən How to pronounce insulation (audio) \

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

According to Curbed, the Climate Mobilization Act’s most ambitious provision is to require any buildings of more than 25,000 square feet to retrofit things like windows and insulation in order to increase energy efficiency. Lucy Diavolo, Teen Vogue, "New York City Passed Its Own Green New Deal–Like Legislation," 19 Apr. 2019 Polartec isn’t the only company manufacturing insulation from recycled materials. Ariella Gintzler, Outside Online, "Polartec’s Synthetic Insulation Is Now Fully Recycled," 15 June 2018 At the top of Entergy's list of recommendations is attic insulation. Greg Larose,, "Entergy warns customers with tips to avoid high bills in hot weather," 5 June 2018 One of the key energy-saving components of today’s new homes is spray foam insulation, which is applied to an average depth of five inches. Houston Chronicle, "Stay cool this summer at Elyson with energy-efficient new homes," 29 Apr. 2018 Feathers are excellent insulation and there is natural food available, enough to keep birds alive even without the aid of feeders. Taylor Piephoff, charlotteobserver, "Local birds weathered NC snow just fine | Charlotte Observer," 19 Jan. 2018 Photos showed what appeared to be insulation heaped on the pavement and dangling from above. Martin Weil, Washington Post, "Partial ceiling collapse at Walter Reed National Military Medical Center in Bethesda," 16 Jan. 2018 Alas for the poor dreamer, who has emerged unarmored from the womb of nature and who has been cast into the world without the indispensable insulation. Ben Brantley, New York Times, "Tennessee Williams, Restless and Revising," 12 Feb. 2018 Larger outer tubes cradle you in the center of the bed, and the superior insulation keeps you extra warm. Rebecca Straus, Sunset, "10 Best Air Mattresses for Camping," 22 Jan. 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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Statistics for insulation

Last Updated

21 May 2019

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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 How to pronounce insulation (audio) \

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 How to pronounce insulation (audio) \

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 How to pronounce insulate (audio) \ 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).


using a distributed computer network

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