The aggregate of two or more numbers, magnitudes, quantities, or particulars; the amount or whole of any number of individuals or particulars added together; as, the sum of 5 and 7 is 12.(noun)
source: webster1913
verb (v)
be a summary of(verb.stative)
Example: The abstract summarizes the main ideas in the paper.
To bring together into one whole; to collect into one amount; to cast up, as a column of figures; to ascertain the totality of; -- usually with up.(verb)