n.
Pronunciation: ə - ' di-sh ə n, a-
Function: noun
Etymology: addicion Anglo-French, from Latin addition-, additio, from addere
Date: 14th century
1 : a part added (as to a building or residential section)
2 : the result of adding : INCREASE
3 : the act or process of adding especially : the operation of combining numbers so as to obtain an equivalent simple quantity
4 : direct chemical combination of substances into a single product
– in addition : 2 BESIDES , ALSO
– in addition to : combined or associated with : 1 BESIDES 2