alteration
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 act of making something different (as e.g. the size of a garment)
the act of revising or altering (involving reconsideration and modification)
“it would require a drastic revision of his opinion”
Synonymsrevision
Source: WordNet 3.1, Princeton University
