insulation
noun
in·su·la·tion
ˌin(t)-sə-ˈlā-shən 
1
: material used in insulating
2
a
: the state of being insulated
b
: the action of insulating
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
A number of questions have been raised about whether fire safety standards were respected in the bar, where prosecutors believe the blaze started when champagne bottles with sparklers attached were raised too close to sound insulation foam on the ceiling in the bar's basement section.
—
CBS News, 8 Jan. 2026
Its thick vacuum insulation keeps drinks chilled for up to 12 hours and iced for up to two days.
—Jamie Allison Sanders, PEOPLE, 6 Jan. 2026
Previous reviews had not found fault with the foam sound insulation, now suspected to have been central to how the fire consumed the bar.
—Joseph Ataman, CNN Money, 6 Jan. 2026
Some come with thick stone walls — those at the Neill-Cochran House are 18 inches of solid stone — which provided superior insulation compared to early houses made of log or sawed lumber.
—Michael Barnes, Austin American Statesman, 4 Jan. 2026
See All Example Sentences for insulation
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CBS News, 8 Jan. 2026
Its thick vacuum insulation keeps drinks chilled for up to 12 hours and iced for up to two days.
—Jamie Allison Sanders, PEOPLE, 6 Jan. 2026
Previous reviews had not found fault with the foam sound insulation, now suspected to have been central to how the fire consumed the bar.
—Joseph Ataman, CNN Money, 6 Jan. 2026
Some come with thick stone walls — those at the Neill-Cochran House are 18 inches of solid stone — which provided superior insulation compared to early houses made of log or sawed lumber.
—Michael Barnes, Austin American Statesman, 4 Jan. 2026
See All Example Sentences for insulation
Cite this Entry
“Insulation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulation. Accessed 9 Jan. 2026.
Copy CitationKids Definition
insulation
noun
in·su·la·tion
ˌin(t)-sə-ˈlā-shən
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
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
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