[ suhm ]
/ sʌm /
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.
a particular aggregate or total, especially with reference to money: The expenses came to an enormous sum.
an indefinite amount or quantity, especially of money: to lend small sums.
a series of numbers or quantities to be added up.
an arithmetical problem to be solved, or such a problem worked out and having the various steps shown.
the full amount, or the whole.
the substance or gist of a matter, comprehensively or broadly viewed or expressed: the sum of his opinions.
concise or brief form: in sum.
- the limit of the sequence of partial sums of a given infinite series.
- union (def. 10a).
verb (used with object), summed, sum·ming.
to combine into an aggregate or total (often followed by up).
to ascertain the sum of, as by addition.
to bring into or contain in a small compass (often followed by up).
verb (used without object), summed, sum·ming.
to amount (usually followed by to or into): Their expenses summed into the thousands.
- to reckon: We summed up our assets and liabilities.
- to bring into or contain in a brief and comprehensive statement; summarize: to sum up the case for the prosecution.
- to form a quick estimate of: I summed him up in a minute.
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Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Origin of sum
First recorded in 1250–1300; (noun) Middle English summe, from Latin summa “sum,” noun use of feminine of summus “highest,” superlative of superus (see superior); (verb) Middle English summen (from Old French summer), from Medieval Latin summāre, derivative of summa
synonym study for sum
1. See number.
OTHER WORDS FROM sumsumless, adjectivesum·less·ness, nounoutsum, verb (used with object), out·summed, out·sum·ming.
WORDS THAT MAY BE CONFUSED WITH sumsome, sum
Definition for sum (2 of 3)
Definition for sum (3 of 3)
variant of sub- before m: summon.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for sum (1 of 2)
/ (sʌm) /
- the result of the addition of numbers, quantities, objects, etc
- the cardinality of the union of disjoint sets whose cardinalities are the given numbers
one or more columns or rows of numbers to be added, subtracted, multiplied, or divided
maths the limit of a series of sums of the first n terms of a converging infinite series as n tends to infinity
(plural) another name for number work
a quantity, esp of moneyhe borrows enormous sums
the essence or gist of a matter (esp in the phrases in sum, in sum and substance)
a less common word for summary
archaic the summit or maximum
(modifier) complete or final (esp in the phrase sum total)
verb sums, summing or summed
(often foll by up) to add or form a total of (something)
(tr) to calculate the sum of (the terms in a sequence)
See also sum up
Word Origin for sum
C13 summe, from Old French, from Latin summa the top, sum, from summus highest, from superus in a higher position; see super
British Dictionary definitions for sum (2 of 2)
/ (sʊm) /
noun plural sumy (sʊmɪ)
the standard monetary unit of Uzbekistan, divided into 100 tiyin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for sum
[ sŭm ]
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.