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")
Overview of adj plus
The adj plus has 2 senses
plus -- (on the positive side or higher end of a scale; "a plus value"; "temperature of plus 5 degrees"; "a grade of C plus")
plus, positive -- (involving advantage or good; "a plus (or positive) factor")
(Sound)
