Pronunciation: (in'su-lāt", ins'yu-), [key]
—v.t., -lat•ed, -lat•ing.
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.