- A material that has a sufficiently high resistance to the passage of electric current, so that current flow through it is minimal or negligible. Used, for instance, to isolate, protect, and support circuits and conductors, and to prevent the loss of current. Examples include rubber, plastic, ceramic, and glass. Also, an object or device made of such a material. Also called electrical insulation (4), electric insulator, or insulator (2).
- synonym electric insulator
- synonym electrical instrument
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