prep. 1 and, added to, increased by, with the addition of, with an increment of, (coupled) with, together with Two plus three equals five Your initial deposit plus accumulated interest will make a substantial sum.
adj. 2 added, additional, supplementary, extra One must take into account the plus value of the good publicity
n. 3 addition, bonus, extra, gain, benefit, asset, advantage, profit, return Improvements constitute a big plus in evaluating the building