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• siemens
  siemens

  noun

  the standard unit of electrical conductance in the International System of Units (SI), equal to the reciprocal of the ohm and replacing the equivalent MKS unit mho, orreciprocal ohm. S
• Siemens
  Siemens

  noun

  (Ernst) Werner von 1816–92, German inventor and electrical engineer.

siemens

¹ American  

[see-muhnz] / ˈsi mənz /

noun

(used with a singular verb)

1. Electricity. the standard unit of electrical conductance in the International System of Units (SI), equal to the reciprocal of the ohm and replacing the equivalent MKS unit mho, orreciprocal ohm. S

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Siemens ² American  

[see-muhnz, zee-muhns] / ˈsi mənz, ˈzi məns /

noun

1. (Ernst) Werner von 1816–92, German inventor and electrical engineer.

2. his brother Sir William Karl Wilhelm Siemens, 1823–83, English inventor, born in Germany.

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siemens ¹ British  

/ ˈsiːmənz /

noun

1. Formerly called: mho.   S.  the derived SI unit of electrical conductance equal to 1 reciprocal ohm

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Siemens ² British  

/ ˈsiːmənz /

noun

1. Ernst Werner von (ɛrnst ˈvɛrnər fɔn). 1816–92, German engineer, inventor, and pioneer in telegraphy. Among his inventions are the self-excited dynamo and an electrolytic refining process

2. his brother, Sir William, original name Karl Wilhelm Siemens. 1823–83, British engineer, born in Germany, who invented the open-hearth process for making steel

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siemens Scientific  

/ sē′mənz /

• siemens
  plural

1. See mho

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Etymology

Origin of siemens

First recorded in 1930–35; named after Sir W. Siemens

Example Sentences

See Examples For:

Siemens

By comparison, Siemens Energy employs more than 100,000 people and in 2025, its gas services unit reported revenue of over 12 billion euros and its grid technologies unit reported more than 11 billion euros.

From The Wall Street Journal ● Aug. 26, 2026

In Germany, the DAX was 0.2% lower, weighed down by Siemens Energy falling 1.4% and Volkswagen slipping 1.4%.

From The Wall Street Journal ● Aug. 24, 2026

Against the trend was Germany’s DAX—up 0.07%—led by Siemens Energy and Rheinmetall, which were up 4.2% and 2.3% respectively.

From The Wall Street Journal ● Aug. 12, 2026

Tracing its origins back to a telegraph company established in 1847, Siemens makes trains, industrial software, and medical and industrial machinery as well as electrical equipment.

From Barron's ● Aug. 6, 2026

To deconvolute the effects of heredity and environment, Siemens suggested comparing fraternal twins to identical twins.

From "The Gene" by Siddhartha Mukherjee