S: (n) summation, addition, plus (the arithmetic operation of summing; calculating the sum of two or more numbers) "the summation of four and three gives seven"; "four plus three equals seven"
Adjective
S: (adj) plus (on the positive side or higher end of a scale) "a plus value"; "temperature of plus 5 degrees"; "a grade of C plus"
S: (adj) plus, positive (involving advantage or good) "a plus (or positive) factor"