Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “sum”

See all translations

sum

noun uk   /sʌm/ us  

sum noun (AMOUNT OF MONEY)

B1 [C] an amount of money: Huge sums of money are spent on national defence. He'll get £50,000 from the company when he retires, which is a tidy (= large) sum. humorous I worked for three whole weeks for which I received the princely (= very low) sum of $100.
More examples

sum noun (CALCULATION)

[C] a calculation, especially a simple one, using such processes as adding, taking away, multiplying, or dividing: I remember how much I hated doing sums when I was at school.

sum noun (TOTAL)

[S] the whole number or amount when two or more numbers or amounts have been added together: The sum of 13 and 8 is 21.in sum formal considered as a whole: The meeting was, in sum, a disaster.the sum of sth all of something: I'm afraid that's the pitiful sum of my knowledge on the subject!
(Definition of sum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of sum?
Add Cambridge dictionaries to your browser to your website

Definitions of “sum” in other dictionaries

Word of the Day

sail

When a boat or a ship sails, it travels on the water.

Word of the Day

Byronic, Orwellian and Darwinian: adjectives from names.

by Liz Walter,
April 15, 2015
Becoming an adjective is a strange kind of memorial, but it is often a sign of a person having had real influence on the world. Science is full of examples, from Hippocrates, the Greek medic born around 460 BC, who gave his name to the Hippocratic Oath still used by doctors today,

Read More 

dumbwalking noun

April 20, 2015
walking slowly, without paying attention to the world around you because you are consulting a smartphone He told me dumbwalking probably wouldn’t be a long-term problem.

Read More