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quality

In philosophy, a property that applies to things taken singly, in contrast to a relation, which applies to things taken in pairs, triples, etc. The distinction drawn by Galileo and John Locke between primary and secondary qualities is motivated by the fact that modern science seems to reveal that unaided sensory perception gives false or incomplete information about the intrinsic qualities of physical objects. In this view, primary qualities, such as shape, quantity, and motion, are genuine properties of things that are describable by mathematics, whereas secondary qualities, such as odour, taste, sound, and colour, exist only in human consciousness.

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quality

1. Music musical tone colour; timbre

2. Logic the characteristic of a proposition that is dependent on whether it is affirmative or negative

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quality - The totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs. Not to be mistaken for "degree of excellence" or "fitness for use" which meet only part of the definition. [ISO8402].