SUMMATION

summation, addition, plus

(noun) 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”

summation, summing up, rundown

(noun) a concluding summary (as in presenting a case before a law court)

sum, summation, sum total

(noun) the final aggregate; “the sum of all our troubles did not equal the misery they suffered”

summation

(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

Source: WordNet® 3.1

Noun

summation (countable and uncountable, plural summations)

A summarization.

(mathematics) An adding up of a series of items.

Source: Wiktionary

Sum*ma"tion, n. Etym: [Cf. F. sommation. See Sum, v. t.]

Definition: The act of summing, or forming a sum, or total amount; also, an aggregate. Of this series no summation is possible to a finite intellect. De Quincey.

Source: Webster’s Unabridged Dictionary 1913 Edition