Semiconductor definition

sĕmē-kən-dŭktər, sĕmī-
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The definition of a semiconductor is a material that is neither a good conductor or a good insulator but that conducts more electricity when heat, light or voltage is added.

An example of a semiconductor is silicon.

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Any of various solid crystalline substances, such as germanium or silicon, having electrical conductivity greater than insulators but less than good conductors, and used especially as a base material for computer chips and other electronic devices.
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An integrated circuit or other electronic component containing a semiconductor as a base material.
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A substance, as germanium or silicon, whose conductivity is poor at low temperatures but is improved by minute additions of certain substances or by the application of heat, light, or voltage: used in transistors, rectifiers, etc.
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Any of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. In semiconductors, thermal energy is enough to cause a small number of electrons to escape from the valence bonds between the atoms (the valence band ); they orbit instead in the higher-energy conduction band , in which they are relatively free. The resulting gaps in the valence band are called holes . Semiconductors are vital to the design of electronic components and circuitry, including transistors, laser diodes, and memory and computer processing circuits.
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A material that is neither a good conductor of electricity nor a good insulator, but has properties of electrical conductivity somewhere between the two. Silicon and germanium are good semiconductor materials. Dopants such as arsenic and antimony sometimes are introduced during the manufacturing process to alter the performance characteristics of the semiconductor. See also conductor, dopant, and insulator.
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(physics) A substance with electrical properties intermediate between a good conductor and a good insulator.
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Other Word Forms

Noun

Singular:
semiconductor
Plural:
semiconductors