noun (1)
\ ˈsəm How to pronounce sum (audio) \

Definition of sum

 (Entry 1 of 3)

1 : an indefinite or specified amount of money
2 : the whole amount : aggregate
3 : the utmost degree : summit reached the sum of human happiness
4a : a summary of the chief points or thoughts : summation the sum of this criticism follows— C. W. Hendel
b : gist the sum and substance of an argument
5a(1) : the result of adding numbers the sum of 5 and 7 is 12
(2) : the limit of the sum of the first n terms of an infinite series as n increases indefinitely
b : numbers to be added broadly : a problem in arithmetic
in sum
: in short : briefly


summed; summing

Definition of sum (Entry 2 of 3)

transitive verb

1 : to calculate the sum of : total
2 : summarize

intransitive verb

: to reach a sum : amount


noun (2)
\ ˈsəm How to pronounce sum (audio) \
plural sums

Definition of sum (Entry 3 of 3)

the basic monetary unit of Uzbekistan — see Money Table

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Other Words from sum

Noun (1)

summability \ ˌsə-​mə-​ˈbi-​lə-​tē How to pronounce summability (audio) \ noun
summable \ ˈsə-​mə-​bəl How to pronounce summable (audio) \ adjective

Examples of sum in a Sentence


can sum figures in his head faster than I can punch them into a calculator

First Known Use of sum

Noun (1)

14th century, in the meaning defined at sense 1


14th century, in the meaning defined at transitive sense 1

Noun (2)

1993, in the meaning defined above

History and Etymology for sum

Noun (1)

Middle English summe, from Anglo-French sume, somme, from Latin summa, from feminine of summus highest; akin to Latin super over — more at over

Noun (2)

Uzbek so'm ruble

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Dictionary Entries near sum

Sulu Sea






sumac family

Statistics for sum

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Time Traveler for sum

The first known use of sum was in the 14th century

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More Definitions for sum


\ ˈsəm How to pronounce sum (audio) \

Kids Definition of sum

 (Entry 1 of 2)

1 : the result obtained by adding numbers The sum of 4 and 5 is 9.
2 : a problem in arithmetic
3 : a quantity of money We donated a small sum.
4 : the whole amount Two trips is the sum of my travel experience.


summed; summing

Kids Definition of sum (Entry 2 of 2)

: to find the total number of by adding or counting
sum up
: to tell again in a few words : summarize

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More from Merriam-Webster on sum

Rhyming Dictionary: Words that rhyme with sum

Thesaurus: All synonyms and antonyms for sum

Spanish Central: Translation of sum

Nglish: Translation of sum for Spanish Speakers

Britannica English: Translation of sum for Arabic Speakers

Comments on sum

What made you want to look up sum? Please tell us where you read or heard it (including the quote, if possible).


to wander slowly or to speak indistinctly

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