Definition of quality:
an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
a degree or grade of excellence or worth; "the quality of students has risen"; "an executive of low caliber"
a characteristic property that defines the apparent individual nature of something; "each town has a quality all its own"; "the radical character of our demands"
(music) the distinctive property of a complex sound (a voice or noise or musical sound); "the timbre of her soprano was rich and lovely"; "the muffled tones of the broken bell summoned them to meet"
high social status; "a man of quality"
of superior grade; "choice wines"; "prime beef"; "prize carnations"; "quality paper"; "select peaches"
of high social status; "people of quality"; "a quality family"