- Any electric line operating at 69,000 or more volts.
- A physical medium, such as a wire, cable, or waveguide, which serves to transmit or otherwise convey signals, data, electricity, or electromagnetic radiation between points. Examples include communication lines, power lines, and antenna transmission lines. Also called line (2).
- One or more wires, cables, or conductors which serve to supply electric power, especially AC power.
- A transmission line (1) utilized for communications.