Quality

[1] Conformance to requirements in relation to a degree of excellence.
[2] In sound reproduction, the degree to which a sample of reproduced sound resembles a sample of the original sound. The general description of freedom from various types of acoustic distortion in sound-reproducing systems.
[3] The timbre or quality of a note which depends upon the number and magnitude of harmonics of the fundamental.
[4] The condition of a saturated vapor, particularly steam, expressed as the ratio per cent of the vaporized portion to the total weight of liquid and vapor.
[5] In radiography, an indication of the approximate penetrating power. Higher voltages produce higher quality X-rays of shorter wavelength and greater penetration. The term dates from before the nature of X-rays was completely understood. See build quality