Positive  —adj. 1 explicit; definite, unquestionable (positive proof). 2 (of a person) convinced, confident, or overconfident in an opinion. 3 a absolute; not relative. B gram. (of an adjective or adverb) expressing a simple quality without comparison. 4 colloq. Downright (it was a positive miracle). 5 constructive (positive thinking). 6 marked by the presence and not absence of qualities (positive reaction). 7 esp. Philos. Dealing only with matters of fact; practical. 8 tending in a direction naturally or arbitrarily taken as that of increase or progress. 9 greater than zero. 10 electr. Of, containing, or producing the kind of electrical charge produced by rubbing glass with silk; lacking electrons. 11 (of a photographic image) showing lights and shades or colours unreversed. —n. Positive adjective, photograph, quantity, etc.  positively adv. Positiveness n. [latin: related to *position]