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.

---

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

---

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.

---

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.

---

Other Word Forms

Derived Forms

• semiconduction
  noun

Etymology

Origin of semiconductor

First recorded in 1875–80; semi- + conductor

Example Sentences

The semiconductor trade has become crowded as it’s “the only thing that’s working,” he added.

From MarketWatch • Jun. 5, 2026

The company is ubiquitous in the semiconductor space.

From Barron's • Jun. 5, 2026

Import volumes of semiconductor chips are broadly stable, while unit prices have risen sharply, especially in the memory market, it notes.

From The Wall Street Journal • Jun. 5, 2026

This may not be surprising given the impressive scale of the semiconductor rally.

From MarketWatch • Jun. 5, 2026

In the late 1950's workers at the AT&T semiconductor plant in Pennsylvania produced five transistors a day for $7.50 apiece.

From State of the Union Address by Reagan, Ronald