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
The rain over Thursday night will help act as an insulator, keeping temperatures a bit higher.
—
Caelyn Pender, The Mercury News, 5 Feb. 2025
It’s made from durable Canadian hemlock wood that not only looks good but functions as an insulator.
—Clara McMahon, People.com, 20 Jan. 2025
Electrons organize into all sorts of materials, from insulators to magnetic metals to electronic crystals, and slight disturbances seem poised to tip many of these materials into superconducting electron pairs.
—Charlie Wood, WIRED, 12 Jan. 2025
Bottom line: moist soil acts as an insulator, slowing heat loss across a grass plant’s root zone.
—Megan Hughes, Better Homes & Gardens, 7 Jan. 2025
See all Example Sentences for insulator 
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Caelyn Pender, The Mercury News, 5 Feb. 2025
It’s made from durable Canadian hemlock wood that not only looks good but functions as an insulator.
—Clara McMahon, People.com, 20 Jan. 2025
Electrons organize into all sorts of materials, from insulators to magnetic metals to electronic crystals, and slight disturbances seem poised to tip many of these materials into superconducting electron pairs.
—Charlie Wood, WIRED, 12 Jan. 2025
Bottom line: moist soil acts as an insulator, slowing heat loss across a grass plant’s root zone.
—Megan Hughes, Better Homes & Gardens, 7 Jan. 2025
See all Example Sentences for insulator
Dictionary Entries Near insulator
Cite this Entry
“Insulator.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insulator. Accessed 22 Feb. 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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