Pronunciation: (ek"sī-tā'shun, -si-),[key] —n. 1. the act of exciting.
2. the state of being excited.
3. Elect. a. the application of voltage to an electric device, as an electron-tube circuit, an antenna, or a dynamotor, often for producing a magnetic field in the device.
b. the voltage applied.
4. Physics.a process in which a molecule, atom, nucleus, or particle is excited.
5. Also called drive.Electronics.the varying voltage applied to the control electrode of a vacuum tube.