plus

a. [ L., more; akin to Gr. &unr_;, &unr_;, and E. full. See Full, a., and cf. Più, Pleonasm. ] [ 1913 Webster ]

1. (Math.) More, required to be added; positive, as distinguished from negative; -- opposed to minus. [ 1913 Webster ]

2. Hence, in a literary sense, additional; real; actual. [ 1913 Webster ]

Success goes invariably with a certain plus or positive power. Emerson. [ 1913 Webster ]

Plus sign (Math.), the sign (+) which denotes addition, or a positive quantity. [ 1913 Webster ]