Meaning of ADDITION in English

ADDITION

/ əˈdɪʃn; NAmE / noun

1.

[ U ] the process of adding two or more numbers together to find their total :

children learning addition and subtraction

OPP subtraction

2.

[ C ] addition (to sth) a thing that is added to sth else :

the latest addition to our range of cars

an addition to the family (= another child)

( NAmE )

to build a new addition onto a house

3.

[ U ] addition (of sth) the act of adding sth to sth else :

Pasta's basic ingredients are flour and water, sometimes with the addition of eggs or oil.

IDIOMS

- in addition (to sb/sth)

••

WORD ORIGIN

late Middle English : from Latin additio(n-) , from the verb addere , from ad- to + the base of dare put.

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