quality
noun
an essential and distinguishing attribute of something or someone
“the quality of mercy is not strained”
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”
adjective
of superior grade
“choice wines”
“prime beef”
of high social status
“people of quality”
“a quality family”
Source: WordNet 3.1, Princeton University