Transmission is the act of passing something on in another place.
Specifically, it may refer to:
- Transmission (mechanics), a gear system transmitting mechanical power, as in a car
- Transmission (telecommunications), the act of transmitting messages over distances
- Transmission (medicine), the passing of a disease
- Share transmission, ownership change through other than transfer
- Transmission (wave propagation), in physics, chemistry, and optics
- Electric power transmission, one process in the delivery of electricity to consumers
- Transmission tower, providing support for overhead power lines
- Transmission line, for the carriage of radio-frequency signals
- Data transmission, the conveyance of information from one space to another
- Dharma transmission, the formal confirmation of a student's awakening in Zen Buddhism
- Transmission (genetics), is the passing on of genetic information