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.
According to the firm, the Brda has excellent insulation so could be used for full-time living, though the configuration shown seems better-suited as a vacation home or guest house for all but the most dedicated downsizers. — New Atlas, 2 Sep. 2026 But at least here, those campers have become year-round homes, their undercarriages wrapped in insulation. — Ren Larson, ProPublica, 2 Sep. 2026 During the family’s ownership, nearly every window was replaced with an exact replica of the original, while the plumbing, wiring, electrical systems, insulation, heating, and air conditioning were upgraded. — Abby Montanez, Robb Report, 2 Sep. 2026 Replacing windows, adding exterior awnings or upgrading insulation usually requires landlord approval. — Ryan Brennan, Miami Herald, 1 Sep. 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 4 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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