tuning noun. ['tju:nɪŋ] M16.
[from TUNE verb + -ING¹.]
The action of TUNE verb, an instance of this; spec. (a) the action or process of putting a musical instrument in tune; a system by which this is done; (b) the process of adjusting an engine or its parts in order to increase efficiency; (c) the adjustment of a transmitter or receiver to a particular signal frequency or wavelength; variation of the resonant frequency of an oscillatory circuit; the facility on a radio set etc. allowing reception of different stations, frequencies, or wavelengths.

Comb.:
tuning-cone a hollow cone of wood or metal used for tuning the metal flue-pipes of an organ; tuning-fork: see FORK noun 4; tuning-hammer a tuning-key used to drive in the wrest-pins in a piano; tuning-key a key used to turn the wrest-pins when tuning or fitting strings in a piano, harp, etc.; tuning meter a device which measures how accurately a radio receiver is tuned to a given frequency etc.; tuning-peg, tuning-pin any of the pegs round which the strings of a stringed instrument are passed, and which are turned to tune the instrument; a wrest-pin; tuning-slide a slide in a metal wind instrument, used to bring it into tune; tuning-wire a bent wire in a reed-pipe of an organ, used in tuning.

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