Plus (?), a. [L., more; akin to Gr. , , and E. full. See Full, a., and cf. Piu, Pleonasm.]
More, required to be added; positive, as distinguished from negative; -- opposed to minus.
Hence, in a literary sense, additional; real; actual.
Success goes invariably with a certain plus or positive power.
Plus sign Math., the sign (+) which denotes addition, or a positive quantity.
© Webster 1913.