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
Myelin acts as an insulator that helps pass the brain’s electrical pulses between neurons safely and efficiently.
—
Monica Cull, Discover Magazine, 3 Apr. 2025
The revenues were derived from a commercial agreement with the Israel Electric Corporation for high-voltage insulator washing services.
—Quartz Intelligence Newsroom, Quartz, 20 Mar. 2025
The Factorial product development team use an insulator in the lab.
—IEEE Spectrum, 12 Mar. 2025
State investigators later found that Slayton’s companies improperly removed and dumped the cancer-causing insulator, endangering workers and residents.
—Max Levy, The Denver Post, 23 Nov. 2024
See All Example Sentences for insulator
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Monica Cull, Discover Magazine, 3 Apr. 2025
The revenues were derived from a commercial agreement with the Israel Electric Corporation for high-voltage insulator washing services.
—Quartz Intelligence Newsroom, Quartz, 20 Mar. 2025
The Factorial product development team use an insulator in the lab.
—IEEE Spectrum, 12 Mar. 2025
State investigators later found that Slayton’s companies improperly removed and dumped the cancer-causing insulator, endangering workers and residents.
—Max Levy, The Denver Post, 23 Nov. 2024
See All Example Sentences for insulator
Cite this Entry
“Insulator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulator. Accessed 10 Apr. 2025.
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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