insulator
noun
in·su·la·tor
ˈin(t)-sə-ˌlā-tər 
: one that insulates: such as
a
: a material that is a poor conductor (as of electricity or heat) compare semiconductor
b
: a device made of an electrical insulating material and used for separating or supporting conductors
Examples of insulator in a Sentence
Metal is not a good insulator.
Recent Examples on the Web
It was first used in construction in the 1930s and became ubiquitous as an insulator in schools, hospitals, homes and offices as well as consumer products.
—
Coral Davenport, New York Times, 18 Mar. 2024
Snow is a fantastic—if counterintuitive—insulator, acting as a blanket to prevent the true chill of Arctic winter from penetrating the ground.
—Matt Simon, WIRED, 4 Mar. 2024
But Cao said pursuing its use for transistors holds more promise, because currently no other material works well as an insulator for 2D semiconductors.
—IEEE Spectrum, 24 Jan. 2024
Most herbaceous perennials spend the winter just a few inches below the soil surface and even though soil is a good insulator, the ground often freezes — so these plants aren’t avoiding freezing.
—Paul Cappiello, The Courier-Journal, 19 Jan. 2024
The insulator on one chip affixes to the other when they are pressed together.
—IEEE Spectrum, 21 Feb. 2024
Thin layers can help trap warm air and act as insulators beneath a snowsuit.
—Katrina Cossey, Parents, 12 Feb. 2024
Standing on cardboard helps the body maintain heat as the airy material acts as an insulator that prevents warm air from escaping to cold concrete floors.
—Dillon Mullan, Baltimore Sun, 19 Jan. 2024
That’s not the case for an insulator, a material like wood, plastic, or glass.
—WIRED, 27 Oct. 2023
Coral Davenport, New York Times, 18 Mar. 2024
Snow is a fantastic—if counterintuitive—insulator, acting as a blanket to prevent the true chill of Arctic winter from penetrating the ground.
—Matt Simon, WIRED, 4 Mar. 2024
But Cao said pursuing its use for transistors holds more promise, because currently no other material works well as an insulator for 2D semiconductors.
—IEEE Spectrum, 24 Jan. 2024
Most herbaceous perennials spend the winter just a few inches below the soil surface and even though soil is a good insulator, the ground often freezes — so these plants aren’t avoiding freezing.
—Paul Cappiello, The Courier-Journal, 19 Jan. 2024
The insulator on one chip affixes to the other when they are pressed together.
—IEEE Spectrum, 21 Feb. 2024
Thin layers can help trap warm air and act as insulators beneath a snowsuit.
—Katrina Cossey, Parents, 12 Feb. 2024
Standing on cardboard helps the body maintain heat as the airy material acts as an insulator that prevents warm air from escaping to cold concrete floors.
—Dillon Mullan, Baltimore Sun, 19 Jan. 2024
That’s not the case for an insulator, a material like wood, plastic, or glass.
—WIRED, 27 Oct. 2023
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'insulator.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near insulator
Cite this Entry
“Insulator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulator. Accessed 26 Apr. 2024.
Copy CitationKids Definition
insulator
noun
in·su·la·tor
ˈin(t)-sə-ˌlāt-ər
: one that insulates
especially
: a material that is a poor conductor of heat or electricity or a device made of such material
Medical Definition
insulator
noun
in·su·la·tor
ˈin(t)-sə-ˌlāt-ər
: a material that is used to provide insulation
also
: a device made of such material
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