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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. 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 ² 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 Scientific  

/ sē′mənz /

plural

siemens

1. See mho

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Etymology

Origin of siemens

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

Example Sentences

The project began in 1975 during the Shah's reign, and was initially awarded to Germany's Siemens.

From Barron's • Apr. 4, 2026

But Germany's government persuaded Siemens to withdraw over concerns about nuclear proliferation.

From Barron's • Apr. 4, 2026

Adobe, Salesforce, SAP and Siemens are among the major software companies that said they are building on Nvidia's new platform.

From Barron's • Mar. 16, 2026

Germany’s DAX climbed 2% as industrials that tumbled Monday recovered, with Siemens Energy gaining 5.8%.

From The Wall Street Journal • Mar. 10, 2026

In 1924, Hermann Werner Siemens, the German eugenicist and Nazi sympathizer, proposed a twin study that advanced Galton’s proposal by meticulously separating identical twins from fraternal twins.*

From "The Gene" by Siddhartha Mukherjee