alteration
nounUK /ˌɔːl.təˈreɪ.ʃən/
US /ˌɑːl.təˈreɪ.ʃən/
A change made to something.
The tailor made a small alteration to my dress so it would fit better.
OTHER MEANINGS
2. The act or process of changing something.
The alteration of the building took several months to complete.
3. A change in a person's or thing's usual character or condition.
We noticed an alteration in his mood after the good news.
4. A repair or adjustment made to clothing.
She took her coat to the shop for an alteration to the sleeves.