Noun:
1: plus, asset a useful or valuable quality
2: 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:
1: nonnegative, positive, plus on the positive side or higher end of a scale; "a plus value"; "temperature of plus 5 degrees"; "a grade of C plus"
2: plus, positive, advantageous involving advantage or good; "a plus (or positive) factor"