More (by a certain amount); increased (by a specified addition): followed by a noun as an apparent object (a preposition, by, to be supplied): as, the interest plus the disbursements amounts to so much; 6 plus 9 is 15: in this and the next two uses correlative to minus.More than nothing; belonging to the positive side, as of an account; above zero, or above the lowest point of positive reckoning: as, a plus quantity in an equation (that is, one having the plus sign, or when initial having no sign, before it).Marking more than zero; positive: as, the plus sign.In etymology, in composition with; with the addition of (the word or element following): expressed, as in mathematics, by the sign + (see the etymologies in this work). The same sign is occasionally used to indicate cognate or related forms