\Pos"i*tive*ness\, n. The quality or state of being positive; reality; actualness; certainty; confidence; peremptoriness; dogmatism. See {Positive}, a. Positiveness, pedantry, and ill manners. --Swift. The positiveness of sins of commission lies both in the habitude of the will and in the executed act too; the positiveness of sins of omission is in the habitude of the will only. --Norris.