1. To separate, detach, or isolate.
  2. To separate a body or material from others, eg. by non-conductors to prevent the transfer of electricity, heat, etc.
    Ceramic can be used to insulate power lines.

The above text is a snippet from Wiktionary: insulate
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!