Insulate Definition

ĭnsə-lāt, ĭnsyə-

insulated, insulates, insulating

verb

insulated, insulates, insulating

To set apart; detach from the rest; isolate.

Webster's New World

To separate or cover with a nonconducting material in order to prevent the passage or leakage of electricity, heat, sound, radioactive particles, etc.

Webster's New World

To cause to be in a detached or isolated position.

American Heritage

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.

Wiktionary

Synonyms:

Origin of Insulate

From Late Latin insulatus (“made like an island”), past participle of insulare (“to make like an island”), from insula (“island”); see insular.

From Wiktionary
Latin īnsula island –ate

From American Heritage Dictionary of the English Language, 5th Edition