Pronunciation: (tō-nal'i-tē), [key]
a. the sum of relations, melodic and harmonic, existing between the tones of a scale or musical system.
b. a particular scale or system of tones; a key.
2. (in painting, graphics, etc.) the system of tones or tints, or the color scheme, of a picture.
3. the quality of tones.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.