the action of forcing someone to leave a country, especially someone who has no legal right to be there or who has broken the law

There were mass deportations in the 1930s, when thousands of people were forced to leave the country. 1930年代出现了大规模的驱逐事件，数以万计的人被迫离开那个国家。

Their cases will be reviewed and they may face deportation. 他们的情况会被审核，有可能被驱逐出境。