The Collaborative International Dictionary of English v.0.48:

Insulate \In"su*late\, v. t. [imp. & p. p. Insulated; p. pr. &
   vb. n. Insulating.] [L. insulatus insulated, fr. insula
   island. See Isle, and cf. Isolate.]
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   1. To make an island of. [Obs.] --Pennant.
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   2. To place in a detached situation, or in a state having no
      communication with surrounding objects; to isolate; to
      separate.
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   3. (Elec. & Thermotics) To prevent the transfer of
      electricity or heat to or from (bodies) by the
      interposition of nonconductors.
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   Insulating stool (Elec.), a stool with legs of glass or
      some other nonconductor of electricity, used for
      insulating a person or any object placed upon it.
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The Collaborative International Dictionary of English v.0.48:

Insulated \In"su*la`ted\ ([i^]n"s[-u]*l[=a]"t[e^]d), p. a.
   1. Standing by itself; not being contiguous to other bodies;
      separated; unconnected; isolated; as, an insulated house
      or column.
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            The special and insulated situation of the Jews.
                                                  --De Quincey.
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   2. (Elect. & Thermotics) Separated from other bodies by means
      of nonconductors of heat or electricity.
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   3. (Astron.) Situated at so great a distance as to be beyond
      the effect of gravitation; -- said of stars supposed to be
      so far apart that the affect of their mutual attraction is
      insensible. --C. A. Young.
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   Insulated wire, wire covered with some nonconducting
      material, such as plastic or silk, for use in conducting
      electricity.
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