noun
Formal legal term for the forced removal of a foreign national from a country. Often used in immigration contexts.
不法滞在が発覚し、国外退去を命じられた。
His illegal stay was discovered and he was ordered to be deported.
強制送還 is a broader term for forced repatriation, while 国外退去 specifically refers to deportation ordered by immigration authorities.
Compound of 国外 (outside the country) and 退去 (departure, leaving).