Definify.com
Webster 1913 Edition
Insulation
Inˊsu-la′tion
,Noun.
1.
The act of insulating, or the state of being insulated; detachment from other objects; isolation.
2.
(Elec. & Thermotics)
The act of separating a body from others by nonconductors, so as to prevent the transfer of electricity or of heat; also, the state of a body so separated.
Webster 1828 Edition
Insulation
INSULA'TION
,Noun.
1.
In electrical experiments, that state in which the communication of electrical fluid is prevented by the interposition of an electric body.