Summation definition

noun

(1) 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"

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

(3) The final aggregate

"The sum of all our troubles did not equal the misery they suffered"

(4) (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