Definitions of distinction:

• noun:   a distinguishing difference

  Example: "He learned the distinction between gold and lead"

• noun:   a distinguishing quality

  Example: "It has the distinction of being the cheapest restaurant in town"

• noun:   a discrimination between things as different and distinct

  Example: "It is necessary to make a distinction between love and infatuation"

• noun:   high status importance owing to marked superiority