Meaning of SUM in English

SUM

/ sʌm; NAmE / noun , verb

■ noun

1.

[ C ] sum (of sth) an amount of money :

You will be fined the sum of £200.

a large sum of money

a six-figure sum

—see also lump sum

2.

[ C , usually sing. ] sum (of sth) the number you get when you add two or more numbers together :

The sum of 7 and 12 is 19.

3.

(also ˌsum ˈtotal ) [ sing. ] the ~ of sth all of sth, especially when you think that it is not very much :

This is the sum of my achievements so far.

4.

[ C ] a simple problem that involves calculating numbers :

to do a sum in your head

I was good at sums at school.

If I've got my sums right, I should be able to afford the rent.

IDIOMS

- be greater / more than the sum of its parts

- in sum

■ verb

( -mm- )

PHRASAL VERBS

- sum up | sum sth up

- sum sb/sth up

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WORD ORIGIN

Middle English : via Old French from Latin summa main part, sum total, feminine of summus highest.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.