Definition of quality noun from the Oxford Advanced American Dictionary

      

    quality

     noun
    noun
    NAmE//ˈkwɑlət̮i//
     
    (pl. qualities)
     
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  1. 1 [uncountable, countable] the standard of something when it is compared to other things like it; how good or bad something is to be of good/poor/top quality materials of a high quality high-quality materials a decline in water quality When costs are cut, product quality suffers. Their quality of life improved dramatically when they moved to North Carolina.
  2. 2 [uncountable] a high standard synonym excellence contemporary writers of quality We aim to provide quality at reasonable prices. Get it right, even if it takes time; it's quality, not quantity, that matters.
  3. 3 [countable] a thing that is part of a person's character, especially something good personal qualities such as honesty and generosity to have leadership qualities She has all the qualities of a good teacher. It's hard to find people with the right qualities for the job.
  4. 4[countable, uncountable] a feature of something, especially one that makes it different from something else the special quality of light and shade in her paintings His voice has a rich, melodic quality.
See the Oxford Advanced Learner's Dictionary entry: quality