Sum
Part of speech: noun
Definition: A quantity obtained by addition or aggregation. An arithmetic computation, especially one posed to a student as an exercise (not necessarily limited to addition.) A quantity of money. A summary. A central idea or point. The utmost degree. An old English measure of corn equal to the quarter. The basic unit of money in Kyrgyzstan. The basic unit of money in Uzbekistan.
Part of speech: verb
Definition: To add together. To give a summary of.
Example sentence: The collective unconscious consists of the sum of the instincts and their correlates, the archetypes. Just as everybody possesses instincts, so he also possesses a stock of archetypal images.
Summation
Part of speech: noun
Definition: A summarization.An adding up of a series of items.