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Freebase(5.00 / 1 vote)Rate this definition: Electret. Electret is a dielectric material that has a quasi-permanent electric charge or dipole polarisation. An electret generates internal and external electric fields, and is the electrostatic equivalent of a permanent magnet. Oliver Heaviside coined this term in 1885.
Of or relating to a selection by vote. 2. Filled or obtained by election: elective office. 3. Having the power or authority to elect; electoral. 4. Permitting or involving a choice; optional: elective surgery.