from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The act or process of adding; addition.
  • noun A sum or aggregate.
  • noun A concluding argument after the presentation of a legal case, especially an argument made to a judge or jury by an attorney for a party as to why that party should prevail.
  • noun Physiology The process by which multiple or repeated stimuli can produce a response in a nerve, muscle, or other part that one stimulus alone cannot produce.

from The Century Dictionary.

  • noun Addition; specifically, the process of finding the sum of a series, or the limit toward which the sum of an infinite series converges; any combination of particular quantities in a total.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of summing, or forming a sum, or total amount; also, an aggregate.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A summarization.
  • noun mathematics : An adding up of a series of items.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the arithmetic operation of summing; calculating the sum of two or more numbers
  • noun a concluding summary (as in presenting a case before a law court)
  • noun (physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce
  • noun the final aggregate


from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin summātiō, summātiōn-, from Late Latin summātus, past participle of summāre, to sum up, from Latin summa, sum; see sum.]


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