Definition of dielectric in English:

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Pronunciation: /ˌdʌɪɪˈlɛktrɪk/


Having the property of transmitting electric force without conduction; insulating.
Example sentences
  • The accumulation of excessive electric charge in dielectric insulation is extremely rare, but when it does occur, it is often catastrophic.
  • An electrically polarizable object will be trapped in a region of a focused electric field, provided there is sufficient dielectric response to overcome thermal energy and the electrophoretic force.
  • The conductance caused by dielectric breakdown of membranes is proportional to the amplitude and duration of the electric field.


A medium or substance with a dielectric property; an insulator.
Example sentences
  • In many photonic structures composed of two or more dielectrics, the absolute value of the refractive index contrast is critical to performance.
  • At that size, it expects to make use of new materials and high-k dielectrics.
  • But low-k dielectrics improve the insulation between the circuits, thus allowing efficient transistor switching without the need for excessive power, and consequently without the extra heat.



Example sentences
  • In addition, for systems composed of dielectrically significantly dissimilar regions, ionic energetics is sensitive to the long-range artifacts imposed by periodic boundary conditions.
  • The magnitude of the first effect depends on the (dielectrically weighted) relative depth of groups A and B in the membrane.
  • It is a dielectrically isolated, high-speed, complementary bipolar IC process that uses a technology called deep trench on bonded wafer, and enables complete dielectric isolation.


Mid 19th century: from di-3 + electric, literally 'across which electricity is transmitted (without conduction)'.

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