insulation

noun

1. (countable, uncountable)The act of insulating; detachment from other objects; isolation.

   “Reindeer are well suited to the taiga’s frigid winters. They can maintain a thermogradient between body core and the environment of up to 100 degrees, in part because of insulation provided by their fur, and in part because of counter-current vascular heat exchange systems in their legs and nasal passages.”

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