Definition of insulate in English:

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Pronunciation: /ˈinsəˌlāt/


[with object]
1Protect (something) by interposing material that prevents the loss of heat or the intrusion of sound: the room was heavily insulated against all outside noise
More example sentences
  • With hot water heating systems, the diameter of the piping remains constant, the slope is irrelevant, and all lines are insulated to prevent heat loss.
  • Two rival theories are based on the roles of feathers in insulating the body against heat loss and in providing an aerodynamic surface for flight.
  • The blankets are specially insulated to keep heat in.
wrap, sheathe, cover, coat, encase, enclose, envelop;
heatproof, soundproof;
pad, cushion
1.1Prevent the passage of electricity to or from (something) by covering it in nonconducting material: the case is carefully insulated to prevent short circuits
More example sentences
  • A second insulator layer electrically insulates the wires from the electroconductor layer and the semiconductor substrate.
  • Chemicals covered by the agreement include PCBs, which are used to insulate electric transformers and as additives in plastics and paint, and pesticides such as DDT.
  • Two flat steel bands run through the spine of the lamp, which insulate power feeds and prevent the lamp from buckling.
1.2Protect from the unpleasant effects or elements of something: he claims that the service is complacent and insulated from outside pressures
More example sentences
  • For some it was a profound shock to realise that we are not insulated from the pain and death that accompany life at every point and in every person.
  • You are insulated from the stock market because the company guarantees you will get a proportion of your income when you retire.
  • They allow considerable flexibility for any bright ideas we might get along the way, and we are insulated from many of the hassles encountered in traveling.
protect, save, shield, shelter, screen, cushion, buffer, cocoon;
isolate, segregate, sequester, detach, cut off
2 archaic Make (land) into an island: the village was insulated by every flood of the river
More example sentences
  • The city was insulated by heavy seasonal overspill.


Mid 16th century (sense 2): from Latin insula 'island' + -ate3.

For editors and proofreaders

Syllabification: in·su·late

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