verb (used with object),in·su·lat·ed,in·su·lat·ing.
to cover, line, or separate with a material that prevents or reduces the passage, transfer, or leakage of heat, electricity, or sound: to insulate an electric wire with a rubber sheath; to insulate a coat with down.
to place in an isolated situation or condition; segregate.
Origin of insulate
First recorded in 1530–40,insulate is from the Latin word insulātus made into an island. See insula, -ate1
Related formsnon·in·su·lat·ing, adjectivepre·in·su·late, verb (used with object),pre·in·su·lat·ed,pre·in·su·lat·ing.re·in·su·late, verb (used with object),re·in·su·lat·ed,re·in·su·lat·ing.su·per·in·su·lat·ed, adjectiveun·in·su·lat·ed, adjectivewell-in·su·lat·ed, adjective
1530s, "make into an island," from Latin insulatus, from insula (see insular). Sense of "cause a person or thing to be detached from surroundings" is from 1785. Electrical/chemical sense of "block from electricity or heat" is from 1742. Related: Insulated; insulating.