say it: suh-MAY-shuhn
summation is a noun meaning "a concluding summary (as in presenting a case before a law court)". It carries 4 recorded senses.
a concluding summary (as in presenting a case before a law court)
law
(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
physiology
the final aggregate
“the sum of all our troubles did not equal the misery they suffered”
the arithmetic operation of summing; calculating the sum of two or more numbers
“the summation of four and three gives seven”
“four plus three equals seven”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for summation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.