reunification
noun [ U ] uk/ˌriː.juː.nɪ.fɪˈkeɪ.ʃən/ us/ˌriː.juː.nə.fəˈkeɪ.ʃən/
重新统一
an occasion when a country that was temporarily divided into smaller countries is joined together again as one country
the reunification of Germany 德国的重新统一