quality in WordNet English dictionary

1. a degree or grade of excellence or worth
   "the quality of students has risen"; "an executive of low caliber"
   quality  caliber  calibre 
   
2. 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"
   quality  character  lineament 
   
3. an essential and distinguishing attribute of something or someone
   "the quality of mercy is not strained"--Shakespeare
   quality 
   
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"
   timbre  timber  quality  tone 
   
5. high social status
   "a man of quality"
   quality 
   

1. of superior grade
   "choice wines"; "prime beef"; "prize carnations"; "quality paper"; "select peaches"
   choice  prime  prize  quality  select 
   
2. of high social status
   "people of quality"; "a quality family"
   quality