• synonyms


[suh-mey-shuh n]
See more synonyms for summation on Thesaurus.com
  1. the act or process of summing.
  2. the result of this; an aggregate or total.
  3. a review or recapitulation of previously stated facts or statements, often with a final conclusion or conclusions drawn from them.
  4. Law. the final arguments of opposing attorneys before a case goes to the jury.
  5. Physiology. the arousal of impulses by a rapid succession of stimuli, carried either by separate sensory neurons (spatial summation) or by the same sensory neuron (temporal summation).
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Origin of summation

1750–60; < Medieval Latin summātiōn- (stem of summātiō), equivalent to summāt(us) (past participle of summāre to sum; see -ate1) + -iōn- -ion
Related formssum·ma·tion·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for summation

Contemporary Examples

Historical Examples

  • In which summation he showed himself indeed a “sumner,” as it was called of yore.


    Charles Godfrey Leland

  • Continued proportion, the series and the summation of the series.

    Electric Gas Lighting

    Norman H. Schneider

  • He also seems to agree with your summation of the Islamic problem.

    Black Man's Burden

    Dallas McCord Reynolds

  • A number of us were doing our best to apprehend the summation of all this flood of change.

    What is Coming?

    H. G. Wells

  • He is the summation of selfishness because he puts his decisions and determinations above those of any or all others.

    Idling in Italy

    Joseph Collins

British Dictionary definitions for summation


  1. the act or process of determining a sum; addition
  2. the result of such an act or process
  3. a summary
  4. US law the concluding statements made by opposing counsel in a case before a court
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Derived Formssummational, adjectivesummative, adjective

Word Origin

C18: from Medieval Latin summātiō, from summāre to total, from Latin summa sum 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for summation


1760, from Modern Latin summationem (nominative summatio) "an adding up," from Late Latin summatus, past participle of summare "to sum up," from Latin summa (see sum).

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Online Etymology Dictionary, © 2010 Douglas Harper

summation in Medicine


  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.