1. full of hope and confidence, or giving cause for hope and confidence
As an adjective 'positive' describes something which consists of the presence rather than the absence of distinguishing features. A positive image, for example, is an image where the tones correspond to those of the original subject whereas a 'negative image' reverses the light and dark areas. It is also an adjective used to describe someone who is optimistic and has a hopeful or confident attitude.”I am a positive person who always looks on the bright side of things.” If you are ‘positive about something’ it means you are sure of it or certain about it. "I am positive that this is a good move for us." If a medical test is 'positive' it means the disease or infection is present for which someone is being tested. "She tested positive for meningitis." When talking about numbers, a 'positive' number is a whole number or any amount more than zero. You can also have a positive electrical charge which is one that is carried by protons. If you have a 'positive' blood type you have the rhesus factor in your blood.