[ dahy-i-lek-trik ]
/ ˌdaɪ ɪˈlɛk trɪk /


a nonconducting substance; insulator.
a substance in which an electric field can be maintained with a minimum loss of power.


of or relating to a dielectric substance.

Nearby words

  1. diegesis,
  2. diego garcia,
  3. diehard,
  4. diel,
  5. dieldrin,
  6. dielectric constant,
  7. dielectric heating,
  8. dielectric lens,
  9. dielectric loss,
  10. dielectric strength

Origin of dielectric

First recorded in 1830–40; di-3 + electric

Related formsdi·e·lec·tri·cal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dielectric

British Dictionary definitions for dielectric


/ (ˌdaɪɪˈlɛktrɪk) /


a substance or medium that can sustain a static electric field within it
a substance or body of very low electrical conductivity; insulator


of, concerned with, or having the properties of a dielectric
Derived Formsdielectrically, adverb

Word Origin for dielectric

from dia- + electric

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for dielectric


[ dī′ĭ-lĕktrĭk ]


Having little or no ability to conduct electricity, generally as a result of having no electrons that are free to move.


A dielectric substance, especially one used in a capacitor to maintain an electric field between the plates.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for dielectric


[ (deye-i-lek-trik) ]

A material that conducts (see conduction) electricity poorly or not at all. If a voltage is applied to a dielectric, the atoms in the material arrange themselves in such a way as to oppose the flow of electric current (see also current). Glass, wood, and plastic are common dielectrics. (See insulator.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.