What is the meaning of quality?

noun

• 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.
  • usage: "the quality of students has risen"; "an executive of low caliber"
  • synonyms: caliber, calibre
• A characteristic property that defines the apparent individual nature of something.
  • usage: "each town has a quality all its own"; "the radical character of our demands"
  • synonyms: character, lineament
• Music) the distinctive property of a complex sound (a voice or noise or musical sound. ()
  • usage: "the timbre of her soprano was rich and lovely"; "the muffled tones of the broken bell summoned them to meet"
  • synonyms: timbre, timber, tone
• High social status.
  • usage: "a man of quality"

adjective

• Of superior grade.
  • usage: "choice wines"; "prime beef"; "prize carnations"; "quality paper"; "select peaches"
  • synonyms: choice, prime, prize, select
• Of high social status.
  • usage: "people of quality"; "a quality family"