Definition of plus noun from the Oxford Advanced American Dictionary

      

    plus1

     noun
    noun
    NAmE//plʌs//
     
     
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  1. 1(informal) an advantage; a good thing Knowledge of French is a plus in her job. There were a lot of pluses in the performance.
  2. 2(also plus sign) the symbol ( + ), used in mathematics He put a plus instead of a minus. opposite minus
See the Oxford Advanced Learner's Dictionary entry: plus