Definition of summation noun from the Oxford Advanced American Dictionary

      

    summation

     noun
    noun
    NAmE//sʌˈmeɪʃn//
     
     
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  1. 1[usually singular] (formal) a summary of what has been done or said What he said was a fair summation of the discussion.
  2. 2(formal) a collection of different parts that forms a complete account or impression of someone or something The exhibition presents a summation of the artist's career.
  3. 3 (law) a final speech that a lawyer makes near the end of a trial in court, after all the evidence has been given
See the Oxford Advanced Learner's Dictionary entry: summation