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insulation

American  
[in-suh-ley-shuhn, ins-yuh-] / ˌɪn səˈleɪ ʃən, ˌɪns jə- /

noun

  • insulations
    plural
  1. material used for insulating.

  2. the act of insulating.

  3. the state of being insulated.


insulation British  
/ ˌɪnsjʊˈleɪʃən /

noun

  1. Also called: insulant.  material used to insulate a body, device, or region

  2. the act or process of insulating

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of insulation

First recorded in 1790–1800; insulate + -ion

Explanation

Insulation is the process of keeping heat, sound, or electricity from spreading. It's also the material used to do so. If you can hear your neighbor snoring at night, you might need better sound insulation. Your thermos of hot chocolate stays warm when it's freezing outside because the thermos provides insulation. Similarly, the insulation in an ice chest keeps your sodas and food cool at the beach, even when you're being scorched by the sun. Insulation can also refer to a state of being detached or isolated. If you stay at home and avoid TV, the internet, and phone calls, you are in a state of insulation.

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Vocabulary lists containing insulation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A City of Edinburgh Council report later found a previous building survey carried out in May 2022 identified a series of issues, including "combustible cladding and insulation, combustible decking and internal fire-stopping issues".

From BBC Jul. 14, 2026

According to researchers, any toxic airborne chemicals would likely stem from the charred foam insulation, metal exterior, burned solar panels and any lithium batteries that might have been present inside the warehouse.

From Los Angeles Times Jul. 8, 2026

Standing up as debris fell around him, he waited for the dust and insulation to settle.

From Slate Jul. 7, 2026

He was also given a guided tour of a local company that uses UK hemp crops to make insulation material.

From BBC Jul. 2, 2026

When the cold was extreme, even the excellent insulation of the tent could not keep it out, and we lay in our bags as close to the stove as possible.

From "The Left Hand of Darkness" by Ursula K. Le Guin

Almost all of the external wall insulations delivered under the scheme – 98% – required repairs, according to the a report by the National Audit Office.

From BBC Apr. 22, 2026

Recycled IT equipment and household goods make up the building's cladding, signs are from used coffee beans and insulations is provided by sheep wool.

From BBC Dec. 10, 2021

Choosing a winter jacket may seem straightforward, but there’s an almost dizzying array of styles, fabrics and insulations to sift through.

From Washington Post Dec. 6, 2021

These special foams expand with less force than some regular expanding foam insulations.

From Washington Post Dec. 3, 2010

It is specially adapted for use in hot climates, and is the only cell in which jars may touch each other and yet retain their insulations.

From Electric Bells and All About Them A Practical Book for Practical Men by S. R. Bottone

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