[1] : The Collaborative International Dictionary of English v.0.48

sum \sum\, v. t. imp.  p. p. summed; p. pr.  vb. n.
   summing. cf. f. sommer, ll. summare.
   1. to bring together into one whole; to collect into one
      amount; to cast up, as a column of figures; to ascertain
      the totality of; -- usually with up.
      1913 webster

            the mind doth value every moment, and then the hour
            doth rather sum up the moments, than divide the day.
                                                  --bacon.
      1913 webster

   2. to bring or collect into a small compass; to comprise in a
      few words; to condense; -- usually with up.
      1913 webster

            "go to the ant, thou sluggard," in few words sums up
            the moral of this fable.              --l'estrange.
      1913 webster

            he sums their virtues in himself alone. --dryden.
      1913 webster

   3. falconry to have the feathers full grown; to furnish
      with complete, or full-grown, plumage.
      1913 webster

            but feathered soon and fledge
            they summed their pens wings.       --milton.
      1913 webster

   summing up, a compendium or abridgment; a recapitulation; a
      r'esum'e; a summary.
      1913 webster

   syn: to cast up; collect; comprise; condense; comprehend;
        compute.
        1913 webster sumac
see also:
summed summing summing up 

[2] : WordNet (r) 2.0

summing up
     n : a concluding summary as in presenting a case before a law
         court syn: summation, rundown
see also:
summation rundown 

[3] : Moby Thesaurus II by Grady Ward, 1.0

43 moby thesaurus words for "summing up":
   account, accounts, argument, body count, capitulation, census,
   copy, count, critique, dwelling upon, elaboration, epitome,
   evidence, going over, head count, inventory, iteration, nose count,
   practicing, reaffirmation, recap, recapitulation, recital,
   reckoning, recount, recountal, recounting, rehash, rehearsal,
   reissue, reiteration, repertory, reprint, restatement, resume,
   retelling, review, statement, sum, summary, summation, summing,
   testimony

[4] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

summing up, practice. the act of making a speech before a court and jury, 
after all the evidence has been heard, in favor of one of the parties in the 
cause, is called summing up. when the judge delivers his charge to the jury, 
he is also said to sum up the evidence in the case. 6 harg. st. tr. 832; 1 
chit. cr. law, 632. 
     2. in summing up, the judge should, with much precision and clearness, 
state the issues joined between the parties, and what the jury are required 
to find, either in the affirmative or negative. he should then state the 
substance of the plaintiff's claim and of the defendant's ground of defence, 
and so much of the evidence as is adduced for each party, pointing out as he 
proceeds, to which particular question or issue it respectively applies, 
taking care to abstain as much as possible from giving an opinion as to the 
facts. it is his duty clearly to state the law arising in the case in such 
terms as to leave no doubt as to his meaning, both for the purpose of 
directing the jury, and with a view of correcting, on a review of the case 
on a motion for a new trial, or on a writ of error, any error he may, in the 
hurry of the trial, have committed. vide 8 s.  r. 150; 1 s.  r. 515; 4 
rawle, r. 100, 195, 356; 2 penna. r. 27; 2 s.  r. 464. vide charge; 
opinion, judgment. 

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