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

This light softshell has a fleece insulation lining and a durable water-repellent (DWR) finish. Adrienne So, WIRED, "26 Great Outdoor Deals From REI's Huge Labor Day Sale," 24 Aug. 2019 Node Node’s technology, still under development, uses standard materials: wood, metal, and insulation. Michael J. Coren, Quartz, "Pre-fab homes are coming to a city backyard near you," 20 Aug. 2019 Another teacher bought insulation from Home Depot to install over the windows. Meghan Lopez, The Denver Post, "60 Denver schools lack air conditioning as city heats up to 98 degrees," 20 Aug. 2019 The explosion, said BFRS Battalion Chief Sebastian Carrillo, was basically a dust explosion that - somewhat like a flash explosion - that ignited the insulation in the ceiling. Carol Robinson |, al, "3 people injured in Midfield business explosion," 30 July 2019 The additional insulation can help protect you from electrical current that might travel through the ground if a strike occurs nearby. David Caraccio, sacbee, "Dramatic video shows lightning strike blowing off top of tree in Lassen," 4 June 2019 If this occurs, the insulation gets wet and is destroyed. Chronicle Staff, Houston Chronicle, "How to wrap pipes right," 16 Jan. 2018 Indorama will purchase Huntsman's segment that produces propylene oxide, a chemical commonly used for insulation and comfort applications in home furniture, building construction and automotive industry. Marissa Luck, Houston Chronicle, "Huntsman to sell chemical intermediate business for $2 billion," 8 Aug. 2019 But no place in your car is safe without insulation and extra cooling. Dave Mcintyre, Washington Post, "As mercury rises, here’s how to keep your wine fresh," 2 Aug. 2019

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

27 Aug 2019

Look-up Popularity

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).


authorized for issue (as a bond)

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