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