insulation

noun

in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən How to pronounce insulation (audio)
Synonyms of insulationnext
1
: material used in insulating
2
a
: the state of being insulated
b
: the action of insulating

Synonyms of insulation

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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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Notably, the team built the coil without conventional electrical insulation between its layers. — Aman Tripathi, Interesting Engineering, 26 Aug. 2026 Replacing windows, upgrading your roof, replacing insulation and getting a new HVAC system can increase your home's efficiency and keep you comfortable all winter long. — Alora Bopray, USA Today, 26 Aug. 2026 The steel and insulation make for a bulletproof cooking experience. — Olivia Tarantino, Bon Appetit Magazine, 26 Aug. 2026 Longer-term investments in ventilation, insulation, and cooling technologies remain important. — Lucy Siers, Footwear News, 21 Aug. 2026 See All Example Sentences for insulation

Word History

First Known Use

1798, in the meaning defined at sense 2b

Time Traveler
The first known use of insulation was in 1798

Rhymes for insulation

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Browse Nearby Words

insulating varnish
insulation
insulation resistance
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Cite this Entry

“Insulation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulation. Accessed 1 Sep. 2026.

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Kids Definition

insulation

noun
in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən How to pronounce insulation (audio)
1
: the act of insulating : the state of being insulated
2
: material used in insulating

Medical Definition

insulation

noun
in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən How to pronounce insulation (audio)
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
insulate
ˈin(t)-sə-ˌlāt How to pronounce insulation (audio)
transitive verb
insulated; insulating
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