Quality, n.

Property; that which belongs to a body or substance, or can be predicated of it. Qualities are natural or accidental. Thus whiteness is a natural quality of snow; softness is a natural quality of wool and fur; hardness is a natural quality of metals and wood; figure and dimension are the natural qualities of solids; but a particular figure, as a cube, a square or a sphere, is an accidental or adventitious quality. The fluidity of metals is an accidental quality. Essential qualities are such as are necessary to constitute a thing what it is. Sensible qualities are such as are perceptible to the senses, as the light of the sun, the color of cloth, the taste of salt or sugar, &c.