Definition of addition
1 : a part added (as to a building or residential section) The addition expanded the kitchen.
2 : anything or anyone added : increase The clerk was a recent addition to the staff.
3 : the act or process of adding a recipe enhanced by the addition of freshly ground pepper; especially : the operation of combining numbers so as to obtain an equivalent simple quantity schoolchildren learning about addition and subtraction
4 : direct chemical combination of substances into a single product
in addition to
: combined or associated with : 1besides 2 In addition to soup, several salads were served.
Examples of addition in a sentence
The children learned addition and subtraction.
The museum's collection includes several new additions.
Origin and Etymology of addition
addicion Anglo-French, from Latin addition-, additio, from addere —see add
First Known Use: 14th century
ADDITION Defined for English Language Learners
Definition of addition for English Language Learners
: the act or process of joining something to something else : the act or process of adding something
mathematics : the act or process of adding numbers
: something or someone more that is included : something or someone that is added
ADDITION Defined for Kids
Definition of addition for Students
1 : the act or process of adding numbers to obtain their sum
2 : something added an addition to a house
: as something more
in addition to
: along with or together with There was ice cream in addition to cake and pie.
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Seen and Heard
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