- Music.
- the sum of relations, melodic and harmonic, existing between the tones of a scale or musical system.
- a particular scale or system of tones; a key.
- (in painting, graphics, etc.) the system of tones or tints, or the color scheme, of a picture.
- the quality of tones.
- music
- the actual or implied presence of a musical key in a composition
- the system of major and minor keys prevalent in Western music since the decline of modes
- the overall scheme of colours and tones in a painting
