| Noun | 1. | siemens - a unit of conductance equal to the reciprocal of an ohmconductance unit - a measure of a material's ability to conduct an electrical charge | |
| 2. | Siemens - engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883) | |
| 3. | Siemens - German electrical engineer (1816-1892) | |