Definition of positive noun from the Oxford Advanced Learner's Dictionary

      

    positive

     noun
    noun
    BrE BrE//ˈpɒzətɪv//
     
    ; NAmE NAmE//ˈpɑːzətɪv//
     
    Experiments and research
     
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    good quality
  1. 1[countable, uncountable] a good or useful quality or aspect Take your weaknesses and translate them into positives. To manage your way out of recession, accentuate the positive.
  2. in photography
  3. 2[countable] (specialist) a developed film showing light and dark areas and colours as they actually were, especially one printed from a negative
  4. result of test
  5. 3[countable] the result of a test or an experiment that shows that a substance or condition is present opposite negative See related entries: Experiments and research
  6. Word Origin late Middle English: from Old French positif, -ive or Latin positivus, from posit- ‘placed’, from the verb ponere. The original sense referred to laws as being formally ‘laid down’, which led to the sense ‘explicitly laid down and admitting no question’, hence ‘certain’.
See the Oxford Advanced American Dictionary entry: positive