Noun
1. a concluding summary (as in presenting a case before a law court)
2. (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
3. the final aggregate;
"the sum of all our troubles did not equal the misery they suffered"4. 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"