addition
//əˈdɪʃən//
Noun
additionSingular
additionsPlural
1
The action or process of adding something to something else.
The addition of salt improved the flavor of the soup.
2
A person or thing added or joined, typically in order to improve something.
The new software is a great addition to our system.
3
The process or skill of calculating the total of two or more numbers or amounts.
Children learn addition and subtraction in elementary school.
4
An extra part added to a building or structure.
They built an addition to the house for the new baby.