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Definition of Insulation

Babylon English

closing or sealing off; isolation, separation; material which blocks or retards the passage of heat (or electricity, sound, etc.)
Insulation Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(n.)
The act of separating a body from others by nonconductors, so as to prevent the transfer of electricity or of heat; also, the state of a body so separated.
  
(n.)
The act of insulating, or the state of being insulated; detachment from other objects; isolation.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

insulation
\in`su*la"tion\ (?), n.
1. the act of insulating, or the state of being insulated; detachment from other objects; isolation.
2. (elec. & thermotics) the act of separating a body from others by nonconductors, so as to prevent the transfer of electricity or of heat; also, the state of a body so separated.
insulation
\in`su*la"tion\, n. the material or substance used in insulating.

WordNet 2.0

Noun
1. the state of being isolated or detached; "the insulation of England was preserved by the English Channel"
(synonym) insularity, insularism, detachment
(hypernym) isolation
(derivation) isolate, insulate
2. a material that reduces or prevents the transmission of heat or sound or electricity
(synonym) insulating material, insulant
(hypernym) building material
(hyponym) lagging
(derivation) insulate
3. the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity
(hypernym) protection
(hyponym) lining
(derivation) insulate
Insulation Definition from Science & Technology Dictionaries & Glossaries
EIA Energy Glossary
Any material or substance that provides a high resistance to the flow of heat from one surface to another. The different types include blanket or batt, foam, or loose fill, which are used to reduce heat transfer by conduction. Dead air space is an insulating medium in storm windows and storms as it reduces passage of heat through conduction and convection. Reflective materials are used to reduce heat transfer by radiation.
Extra insulation around the heating and/or cooling ducts intended to reduce the loss of hot or cold air as it travels to different parts of the residence.
Any material that when placed between the interior surface of the building and the exterior surface of the building, reduces the rate of heat loss to the environment or heat gain from the environment. Roof or ceiling insulation refers to insulation placed in the roof or ceiling of the top occupied floor in the building. Wall insulation refers to insulation placed between the exterior and interior walls of the building.
Source: Energy Information Administration, 2006
Energy Glossary
(THERMAL) - A material having a relatively high resistance of heat flow and used principally to retard heat flow. See R-VALUE.
Dictionary of Automotive Terms
1. Any material which does not conduct electricity. It is used to prevent the flow or leakage of an electrical conductor .
2. Any material which does not readily conduct heat. Used to keep heat or cold out of something.
Insulation Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Insulation means:
  • Building insulation, added to buildings for comfort and energy efficiency
  • Soundproofing, also known as acoustic insulation, any means of reducing the intensity of sound
  • Thermal insulation, materials used to reduce the rate of heat transfer
  • Electrical insulation, the use of material to resist the flow of electric current and magnetism
  • Insulated glass (energy saving)

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