expatriation
noun [ C or U ] uk/ˌeks.pæt.riˈeɪ.ʃən/ us/ˌeks.peɪ.triˈeɪ.ʃən/
流放（国外）;离开本国;移居国外
the use of force or law to remove someone from their own country, or an instance of this happening
The government requested the expatriation of former political prisoners. 政府要求前政治犯移居国外。
There were more expatriations than in the combined previous seven years. 移居海外的人数比过去七年的总和还要多。