The act or process of adding
Something tending to augment something else
The process of adding
That which has been added
An architectural extension
In addition to the assistance from the renters, the money finally gave her an income of her own, and the token independence that went with it.
In addition, all her planning and tenacity were paying off.
It would make a nice addition to their safari.
In addition to the animals we have purchased, there is native wildlife.
He asked if he might record the interview in addition to taking notes.