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
Besides being one of the best ways to stay warm, puffer jackets are also unbelievably packable, much like this Eddie Bauer down jacket that has insulation for chilly days but can be folded or rolled to practically half its size.
—
Kelsey Glennon, Travel + Leisure, 29 Oct. 2025
Modern cloches come in different shapes, and some can even be filled with water for extra insulation.
—Lauren Landers, Better Homes & Gardens, 28 Oct. 2025
These prototypes met Australian standards for load-bearing concrete and showed 30 percent better insulation than conventional cement bricks.
—Neetika Walter, Interesting Engineering, 27 Oct. 2025
Items that cannot be used, including intimates, are recycled into new fibers whenever possible, or downcycled into materials such as insulation or padding.
—Lisa Lockwood, Footwear News, 23 Oct. 2025
See All Example Sentences for insulation
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Kelsey Glennon, Travel + Leisure, 29 Oct. 2025
Modern cloches come in different shapes, and some can even be filled with water for extra insulation.
—Lauren Landers, Better Homes & Gardens, 28 Oct. 2025
These prototypes met Australian standards for load-bearing concrete and showed 30 percent better insulation than conventional cement bricks.
—Neetika Walter, Interesting Engineering, 27 Oct. 2025
Items that cannot be used, including intimates, are recycled into new fibers whenever possible, or downcycled into materials such as insulation or padding.
—Lisa Lockwood, Footwear News, 23 Oct. 2025
See All Example Sentences for insulation
Cite this Entry
“Insulation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulation. Accessed 1 Nov. 2025.
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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