'alteration' definitions:

Definition of 'alteration'

From: WordNet
noun
An event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago" [syn: change, alteration, modification]
noun
The act of making something different (as e.g. the size of a garment) [syn: alteration, modification, adjustment]
noun
The act of revising or altering (involving reconsideration and modification); "it would require a drastic revision of his opinion" [syn: revision, alteration]