IPA: /ˌriːɔːrˈkɛstreɪʃən/
KK: /riˌɔr.kəˈstreɪ.ʃən/
The process of arranging or adapting music for an orchestra again, often after an initial version has been created.
The reorchestration of the symphony brought a fresh sound to the classic piece.
Reorchestration → It is formed from "re-" (meaning again) and "orchestration" (from Greek "orkhestra", meaning a place for dancing, which evolved to mean the arrangement of music for performance). The word "reorchestration" means the act of arranging music again or anew.
Think of arranging music 'again' ('re-') — that's what reorchestration means.