INSULATE DEFINED BY DICTIONARY.COM:
INSULATE DEFINED BY GOVERNMENT:
U.S. 
    Environmental Protection Agency
 
  The 
process of preventing or reducing the transmission of electricity, heat, or sound 
to or from a body, device, or region by surrounding it with a nonconducting material.(Source: 
CED) (Source: European Environment Agency (EEA), European Topic Centre on Catalogue 
of Data Sources (ETC/CDS): General Multilingual Environmental Thesaurus Term Detail)
INSULATE DEFINED BY TRADE:
National Contractor 
  Referrals and License Bureau
 
   
  Any material used to reduce the effects of heat, cold or sound transmission and 
  to reduce fire hazard; any material used in the prevention of the transfer of 
  electricity, heat, cold, moisture and sound.