Noun
1. an essential and distinguishing attribute of something or someone;
"the quality of mercy is not strained"--Shakespeare2. a degree or grade of excellence or worth;
"the quality of students has risen""an executive of low caliber"3. 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"4. (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"5. high social status;
"a man of quality"