alteration
al·ter·a·tion
/ˌɑːltəˈreıʃən/ noun , pl -tions
: the act, process, or result of changing or altering something
[ noncount ] the alteration of the pattern
They did a good job on the dress alteration.
[ count ] The addition of a glossary is the only significant alteration [=change, modification] to the book.
He made alterations in/to his will.
