adj 1  :  directed or moving toward a source of stimulation <a taxis>   2  :  having rendition of light and shade similar in tone to the tones of the original <a photographic image>   3 a (1) :  being, relating to, or charged with electricity of which the proton is the elementary unit and which predominates in a glass body after being rubbed with silk (2) :  having more protons than electrons <a ion>   b (1) :  having higher electrical potential and constituting the part from which the current flows to the external circuit <the terminal of a discharging storage battery>  (2) :  being an electron-collecting electrode of an electron tube  4 a  :  marked by or indicating acceptance, approval, or affirmation  b  :  affirming the presence of that sought or suspected to be present <a test for blood>   5  of a lens  :  converging light rays and forming a real inverted image pos*i*tive*ly adv pos*i*tive*ness n 
, n :  a positive photograph or a print from a negative .
 
   
 
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