- material used for .
- the act of .
- the state of being .
- Also called: insulant (ˈɪnsjʊlənt) material used to insulate a body, device, or region
- the act or process of insulating
1848, “act of making (something) into an island,” noun of action from. Transferred sense attested by 1798. Electrical sense is from 1767. The concrete sense of “insulating material” is recorded by 1870.