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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.
Full Definition of ORDINANCE. 1. a: an authoritative decree or direction: order b: a law set forth by a governmental authority; specifically: a municipal regulation. 2. : something ordained or decreed by fate or a deity.3. : a prescribed usage, practice, or ceremony. See ordinance defined for English-language learners.ull Definition of ORDINANCE. 1. a: an authoritative decree or direction: order b: a law set forth by a governmental authority; specifically: a municipal regulation. 2. : something ordained or decreed by fate or a deity. 3. : a prescribed usage, practice, or ceremony.