additionnoun
uk/əˈdɪʃ.ən/us/əˈdɪʃ.ən/B2 [ U ] the process of adding numbers or amounts together:
Twice a week the children are tested in basic mathematical skills such as addition (= calculating the total of different numbers put together) and subtraction.
in addition (to)
B1 as well (as):
In addition to his apartment in Manhattan, he has a villa in Italy and a castle in Scotland.
B2 [ C ] something that has been added to something else:
A secretary would be a welcome/useful addition to our staff.
humorous I hear you're expecting a small addition to the family (= you are going to have a baby)!
[ C ] the act of adding a substance or thing to something else:
Most working environments are improved by the addition of (= by adding) a few plants and pictures.
[ C ] US UK extension a new part added to a house or other building:
We're building an addition to our house.
More examples
- She's young and dynamic and will be a great addition to the team.
- Some dentists are convinced that the addition of fluoride in water is ineffective.
- The test involves simple calculations, such as addition and subtraction.
- With the addition of a few pictures on the walls, this room will look very homely.
- Have you got any savings in addition to your savings account at the bank?
Thesaurus: synonyms and related words
Augmenting and supplementing
- a new lease of life idiom
- accrue
- add
- add on sth
- addendum
- bolt
- broaden/expand/widen sb's horizons idiom
- bulk
- bulk sth up
- extension
- gain
- horizon
- incremental
- interpolate
- tack sth on
- tag sth on
- top sth up
- weight
- write
- write sth into sth
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You can also find related words, phrases, and synonyms in the topics:
Addition, subtraction, multiplication & division
Also, extra, and in addition
Things added or attached to other things
Parts of buildings in general