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
Here, a tunneling electron microscope image shows a Josephson junction made with alpha-silicon insulator sandwiched between niobium titanium nitrite superconductors, achieving a critical dimension of 210 nanometers.
—
Anna Herr, IEEE Spectrum, 15 May 2024
Most of what remains of the historic General Crook Trail are eroding two tracks, toppled rock cairns, tree blazes, a few telegraph insulators and roadside monuments.
—Mare Czinar, The Arizona Republic, 18 Apr. 2024
See all Example Sentences for insulator 
Anna Herr, IEEE Spectrum, 15 May 2024
Most of what remains of the historic General Crook Trail are eroding two tracks, toppled rock cairns, tree blazes, a few telegraph insulators and roadside monuments.
—Mare Czinar, The Arizona Republic, 18 Apr. 2024
See all Example Sentences for insulator
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 1 Jun. 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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