insulation

Noun

• the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity

• a material that reduces or prevents the transmission of heat or sound or electricity

• the state of being isolated or detached
  • the insulation of England was preserved by the English Channel
    

Related words

• Synonyms: 
  insulating material , insulant , insularity , insularism , detachment