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.] 1. To make an island of. [Obs.] --Pennant. 2. To place in a detached situation, or in a state having no communication with surrounding objects; to isolate; to separate. 3. (Elec. & Thermotics) To prevent the transfer o? electricity or heat to or from (bodies) by the interposition of nonconductors. 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.