definition of
summation

[1] #1 summation n. [summing up, rundown] a concluding summary (as in presenting a case before a law court). wn

[2] #2 summation n. (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. wn

[3] #3 summation n. [sum, sum total] the final aggregate; "the sum of all our troubles did not equal the misery they suffered". wn

[4] #4 summation n. [addition, plus] 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". wn