Positive

n.
  1. That which is capable of being affirmed; reality.
  2. That which settles by absolute appointment.
  3. (Gram.) The positive degree or form.
  4. (Photog.) A picture in which the lights and shades correspond in position with those of the original, instead of being reversed, as in a negative.
  5. (Elec.) The positive plate of a voltaic or electrolytic cell.