/in"seuh layt', ins"yeuh-/ , v.t., insulated, insulating .
1. 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.
2. to place in an isolated situation or condition; segregate.
[ 1530-40; insulatus made into an island. See INSULA, -ATE 1 ]