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A sturdy, moisture-resistant adhesive tape, usually made of cloth, used chiefly to insulate electrical conductors.
(Electronics) US and Canadian adhesive tape, impregnated with a moisture-repelling substance, used to insulate exposed electrical conductors. Also called (in Britain and certain other countries): insulating tape
a cloth or plastic adhesive tape impregnated with a moisture-resistant substance and used esp. to insulate and protect electrical wires and conductors.