structural alteration
nounUK /ˈstrʌk.tʃər.əl ˌɔːl.təˈreɪ.ʃən/
US /ˈstrʌk.tʃɚ.əl ˌɑːl.t̬əˈreɪ.ʃən/
A change to the way a building or object is built.
The city approved a structural alteration to add a new window to the house.
OTHER MEANINGS
2. A change in the way a system or organization is arranged.
The company made a structural alteration to its management team.
3. A change in the basic parts of a material or substance.
Heat caused a structural alteration in the metal.
4. A change to the framework of a piece of writing or plan.
The editor suggested a structural alteration to the report's outline.