,noun, verb, summed, sum⋅ming.| 1. | 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. |
| 2. | a particular aggregate or total, esp. with reference to money: The expenses came to an enormous sum. |
| 3. | an indefinite amount or quantity, esp. of money: to lend small sums. |
| 4. | a series of numbers or quantities to be added up. |
| 5. | an arithmetical problem to be solved, or such a problem worked out and having the various steps shown. |
| 6. | the full amount, or the whole. |
| 7. | the substance or gist of a matter, comprehensively or broadly viewed or expressed: the sum of his opinions. |
| 8. | concise or brief form: in sum. |
| 9. | Mathematics.
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| 10. | a summary. |
| 11. | to combine into an aggregate or total (often fol. by up). |
| 12. | to ascertain the sum of, as by addition. |
| 13. | to bring into or contain in a small compass (often fol. by up). |
| 14. | to amount (usually fol. by to or into): Their expenses summed into the thousands. |
| 15. | sum up,
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| sum (sŭm) Pronunciation Key
The result of adding numbers or quantities. The sum of 6 and 9, for example, is 15, and the sum of 4x and 5x is 9x. |
sum up
Present the substance of, summarize, as in They always sum up the important news in a couple of minutes, or That expletive sums up my feelings about the matter. [Early 1600s]