<p><strong>Noun</strong></p><ul><li>the aggregate of two or more numbers, magnitudes, quantities, or particulars as determined by or as if by the mathematical process of addition: The sum of 6 and 8 is 14.</li><li>a particular aggregate or total, especially with reference to money: The expenses came to an enormous sum.</li><li>an indefinite amount or quantity, especially of money: to lend small sums.</li><li>a series of numbers or quantities to be added up.</li><li>an arithmetical problem to be solved, or such a problem worked out and having the various steps shown.</li><li>the full amount, or the whole.</li><li>the substance or gist of a matter, comprehensively or broadly viewed or expressed: the sum of his opinions.</li><li>concise or brief form: in sum.</li><li>Mathematics: the limit of the sequence of partial sums of a given infinite series.</li><li>union (def 10a).</li><li>a summary.</li></ul>