Noun
(international law, uncountable) Rendition of a person to an area (chiefly their country of origin) where they will face mistreatment, for example, expulsion of refugees into a war zone; (countable) an instance of this.
Antonym: non-refoulement
(archaic, uncountable) The forced relocation of a group of people; (countable) an instance of this.
Source: en.wiktionary.org