One who, or that which, transmits; specifically, that portion of a telegraphic or telephonic instrument by means of which a message is sent; -- opposed to receiver.
- One that transmits: a transmitter of disease.
- An electronic device that generates and amplifies a carrier wave, modulates it with a meaningful signal derived from speech or other sources, and radiates the resulting signal from an antenna.
- The portion of a telephone that converts the incident sounds into electrical impulses that are conveyed to a remote receiver.
- A telegraphic sending instrument.
- A neurotransmitter.