Insulator meaning

ĭn'sə-lā'tər, ĭns'yə-
A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).
noun
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A material that does not conduct electricity, heat, light, etc.
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Anything that insulates.
  • A nonconductor of electricity, heat, or sound.
  • A device, as of glass or porcelain, for insulating and supporting electric wires.
noun
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A device that insulates.
noun
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A material that insulates, especially a nonconductor of sound, heat, or electricity.
noun
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A material that does not conduct electricity. Contrast with conductor.
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In the context of telecommunications, an insulator is a material that does not conduct electricity, i.e., a dielectric. See also conductor and dielectric.
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A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)

To isolate electrical wires from the pylons supporting them, one often uses glass insulators.

noun
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The definition of an insulator is something that is used to keep heat or sound contained, or something that does not conduct electricity.

Soundproofing material is an example of an insulator.

A substance that doesn't conduct electricity well is an example of an insulator.

noun
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A material or an object that does not easily allow heat, electricity, light, or sound to pass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators.
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Origin of insulator

  • From insulate 'to isolate' (itself from Latin insula 'island') + suffix -or
    From Wiktionary