noun (n)

• the state of being isolated or detached(noun.state)

  Example:
  The insulation of England was preserved by the English Channel.
  

  Synonym:
  detachment, insularism, insularity
  

  source: wordnet30
• a material that reduces or prevents the transmission of heat or sound or electricity(noun.substance)

  Synonym:
  insulant, insulating material
  

  source: wordnet30
• the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity(noun.act)

  source: wordnet30
• The act of insulating, or the state of being insulated; detachment from other objects; isolation.(noun)

  source: webster1913
• The material or substance used in insulating.(noun)

  source: webster1913