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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 /

• 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

Siemens Energy said it could bring in external investors or undertake a potential capital markets transaction, and plans to deconsolidate the business while maintaining a meaningful minority stake.

From The Wall Street Journal ● Aug. 26, 2026

Net profit for the three months to end-June rose 15 percent to 2.6 billion euros, Siemens said, while sales rose eight percent to 20.8 billion euros.

From Barron's ● Aug. 6, 2026

German industrial giant Siemens on Thursday raised its profit outlook for the second time this year after a quarter boosted by AI spending, but its shares plunged after the forecast fell short of investors' hopes.

From Barron's ● Aug. 6, 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