summation

(noun) a concluding summary (as in presenting a case before a law court). Synonyms: summing up, rundown.

(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. Synonyms: sum, sum total. Example: "The sum of all our troubles did not equal the misery they suffered."

(noun) the arithmetic operation of summing; calculating the sum of two or more numbers. Synonyms: addition, plus. Examples: "The summation of four and three gives seven." "Four plus three equals seven."