insulation

in·su·la·tion

noun \ˌin(t)-sə-ˈlā-shən\

Definition of INSULATION

1

: the action of separating a conductor from conducting bodies by means of nonconductors so as to prevent transfer of electricity, heat, or sound; also : the state resulting from such action

2

: material used to provide insulation

—in·su·late \ˈin(t)-sə-ˌlāt\ transitive verb, in·su·lat·ed in·su·lat·ing