Jump To:

• 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

---

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.

---

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

---

siemens ² British  

/ ˈsiːmənz /

noun

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

---

siemens Scientific  

/ sē′mənz /

• siemens
  plural

1. See mho

---

Etymology

Origin of siemens

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

Example Sentences

See Examples For:

Siemens

The German DAX rose 0.7%, with chip maker Infineon surging 7% and gas turbine-maker Siemens Energy gaining 3.5%.

From The Wall Street Journal ● Jul. 31, 2026

Find insight on TotalEnergies, Beach and Siemens Energy and more in the latest Market Talks covering energy and utilities.

From The Wall Street Journal ● Jul. 23, 2026

The read-across to Siemens Energy is unwarranted as the German group is more focused on confirmed orders, they say.

From The Wall Street Journal ● Jul. 22, 2026

Germany’s DAX slips 0.2% as energy-intensive stocks fall, though gas-turbine manufacturer Siemens Energy rises 1.7%.

From The Wall Street Journal ● Jul. 20, 2026

For weeks Betsie and I were assigned to the Siemens factory.

From "The Hiding Place" by Corrie ten Boom