What is Plus ?
Plus is (prep) 1. added to His salary plus commission comes to more than £25,000. (NOTE: In calculations plus is usually shown by the sign + : 10 + 4 = 14: say ‘ten plus four equals fourteen’.) 2. more than houses valued at £200,000 plus houses valued at over £200,000 (adj) favourable, good and profitable Being able to drive is certainly a plus factor. on the plus side as a favourable point The weather wasn’t very good, but on the plus side, it didn’t actually rain. (noun) a favourable sign, a good or favourable point It’s a definite plus that the hotel has room service.
source: Easier English, Student Dictionary Upper Intermediate Level