Definitions for "Insulator"
A substance or object that insulates; a nonconductor; as, polyurethane foam is a popular thermal insulator.
any material (e.g., glass) which does not allow an electrical charge to flow through it.
Any material that will not allow electricity to easily flow through.
a sequence that prevents an activating or inactivating effect passing from one side to the other
Intellectual Property Intelligibility
The protective covering along the third rail.
Keywords:  one
One who, or that which, insulates.