/ek'suy tay"sheuhn, -si-/ , 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.
[ 1350-1400; ME excitacioun excitation- (s. of excitatio ), equiv. to L excitat ( us ) (ptp. of excitare; see EXCITE) + -ion- -ION ]