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  1. Dictionary
    Pos·i·tiv·i·ty
    /ˌpäzəˈtivədē/

    noun

    • 1. the practice of being or tendency to be positive or optimistic in attitude: "pupils draw power from the positivity of their teachers"
    • 2. the presence rather than absence of a certain substance, condition, or feature: "the first biopsy specimen demonstrated positivity for cytokeratin"