Noun

The act of insulating, or the state of being insulated; detachment from other objects; isolation.

*{{quote-magazine, date=2013-03

, author=Nancy Langston , title=Mining the Boreal North , volume=101, issue=2, page=98 , magazine= citation , passage=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.}}

Any of a variety of materials designed to reduce the flow of heat, either from or into a building.

(engineering) The act of separating a body from others by nonconductors, so as to prevent the transfer of electricity, heat, or sound

(engineering) The state of a body so separated.

(electrical) a medium in which it is possible to maintain an electrical field with little supply of energy from additional sources.

Noun

(rare) Clothing; clothes.

Any hard coating, bonded onto the outside of something to add protection, such as the plastic sheath around an optical fiber.

(construction) a weatherproof, insulating or decorative covering fixed to the outside of a building (called siding in the US).