sum
 
sum
 (sŭm) noun
Mathematics.
1.
	a. An amount obtained as a result of adding numbers. b. An arithmetic problem: a child good at sums.
2.	The whole amount, quantity, or number; an aggregate: the sum of the team's combined experience. 
3.	An amount of money: paid an enormous sum. 
4.	A summary: my view of the world, in sum. 
5.	The central idea or point; the gist. 
verb
, transitive
summed, summing, sums
1.
	Mathematics. To add. 
2.	To give a summary of; summarize. 
 
phrasal verb.
sum up
1.
	To present the substance of (material) in a condensed form; summarize: sum up the day's news; concluded the lecture by summing up. 
2.
	To describe or assess concisely: an epithet that sums up my feelings. 
 
 
[Middle English summe, from Old French, from Latin summa from feminine of summus, highest.]