Having a real position, existence, or energy; existing in fact; real; actual; -- opposed to negative.

Corresponding with the original in respect to the position of lights and shades, instead of having the lights and shades reversed; as, a positive picture.

Hence, basic; metallic; not acid; -- opposed to negative, and said of metals, bases, and basic radicals.

A picture in which the lights and shades correspond in position with those of the original, instead of being reversed, as in a negative.

indicating existence or presence of a suspected condition or pathogen; "a positive pregnancy test"

usually refers to a test result. If you have a positive TB skin test reaction, you probably have TB infection.

the term used to describe a test result which shows the presence of the substance or material for which the test was carried out; for example, a positive bone scan would show signs of bone metastases

The presence of a specific disease or condition for which the test is being done. When breast cancer tests come back, “positive” it means there is cancer.

Derived from an object by itself; not dependent on changing circumstances or relations; absolute; -- opposed to relative; as, the idea of beauty is not positive, but depends on the different tastes individuals.

Prescribed by express enactment or institution; settled by arbitrary appointment; said of laws.

That which settles by absolute appointment.

Fully assured; confident; certain; sometimes, overconfident; dogmatic; overbearing; -- said of persons.

marked by excessive confidence; "an arrogant and cocksure materialist"; "so overconfident and impudent as to speak to the queen"; "the less he knows the more positive he gets"

persuaded of; very sure; "were convinced that it would be to their advantage to join"; "I am positive he is lying"; "was confident he would win"

the type of electric charge carried by a proton.

having a positive electric charge; "protons are positive"

charged due to an excess of protons