from
The Collaborative International Dictionary of English v.0.48
Plus \Plus\, a. [L., more; akin to Gr. ?, ?, and E. full. See
{Full}, a., and cf. {Pi[`u]}, {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]