semiconductor

American  

[sem-ee-kuhn-duhk-ter, sem-ahy-] / ˌsɛm i kənˈdʌk tər, ˌsɛm aɪ- /

noun

1. a substance, as silicon or germanium, with electrical conductivity intermediate between that of an insulator and a conductor: a basic component of various kinds of electronic circuit element semiconductor device used in communications, control, and detection technology and in computers.

2. a semiconductor device.

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semiconductor British  

/ ˌsɛmɪkənˈdʌktə /

noun

1. a substance, such as germanium or silicon, that has an electrical conductivity that increases with temperature and is intermediate between that of a metal and an insulator

2. 1. a device, such as a transistor or integrated circuit, that depends on the properties of such a substance

   2. ( as modifier )

      a semiconductor diode

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semiconductor Scientific  

/ sĕm′ē-kən-dŭk′tər /

1. 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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semiconductor Cultural  

1. A material that conducts (see conduction) electricity, but very poorly. Silicon is the most common and familiar semiconductor. Devices made from semiconductors, such as the transistor, are the basis of the modern microelectric industry.

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Other Word Forms

Derived Forms

• semiconduction
  noun

Etymology

Origin of semiconductor

First recorded in 1875–80; semi- + conductor

Example Sentences

A frenetic rally in semiconductor stocks abruptly reversed last week, sending the Nasdaq composite down 4.2%, in its worst day in more than a year.

From The Wall Street Journal • Jun. 10, 2026

Germany’s DAX edged 0.1% higher, helped by a 2.7% gain for semiconductor group Infineon Technologies.

From The Wall Street Journal • Jun. 9, 2026

Intel stock surges Monday, leading the S&P 500 amid a broader rebound in semiconductor stocks.

From Barron's • Jun. 8, 2026

Friday’s selloff was led by semiconductor and memory stocks, where very strong gains for the year were made vulnerable by crowded investor positioning and the dynamics of levered exchange-traded funds, says Wilson.

From MarketWatch • Jun. 8, 2026

Their semiconductor and electron- ics products were household words.

From Terminal Compromise: computer terrorism: when privacy and freedom are the victims: a novel by Schwartau, Winn