n. The act of insulating, or the state of being insulated; detachment from other objects; isolation.n. Any of a variety of materials designed to reduce the flow of heat, either from or into a building.n. The act of separating a body from others by nonconductors, so as to prevent the transfer of electricity, heat, or soundn. The state of a body so separated.n. a medium in which it is possible to maintain an electrical field with little supply of energy from additional sources.