We don't really have a term for people who have lived abroad and have returned. However, we do have a word for Koreans living abroad, 교포 kyopo. Kyopo is a pretty broad term that ranges from Koreans who have immigrated to different places and have settled down to descendents of Korean immigrants as well. It basically means Korean diaspora. I guess not many of them have returned enough for us to have a word for that group of people, unless, as pointed out above, they are students. When 교포 Kyopos return to Korea (for visits), we just still refer to them as 교포, or if they settle back down in Korea, I guess we don't really call them kyopo anymore since they are living in Korea, but more say that they were kyopo, or would just say that they used to live somewhere else.

I don't think there is a term widely used for that, but here's some used in news paper articles and such. - 귀국 유학생, 귀환 유학생, 귀환 학생 (returning students) - students who are returning after studying abroad. - 역이민자 (returning expatriates) - people immigrating back to Korean after living abroad as immigrants.

maybe.. I guess the closest word is 유학생 which means the student who go abroad to study or learn forign language for a long time. 留學生 is chinese word..