徙居 is a formal, literary verb meaning 'to relocate one's residence' — that is, to move permanently from one home or dwelling to another, often implying a significant change in location, such as across cities or regions. The character 徙 (xǐ) means 'to move (people or groups)' and carries connotations of migration or resettlement; 居 (jū) means 'to dwell' or 'reside'. Together, they emphasize the act of establishing a new permanent home, rather than temporary lodging or short-term travel.

This term appears frequently in historical, administrative, or journalistic contexts — for example, when describing government-organized resettlement, population shifts due to development projects, or family relocations for work or education. It is rarely used in casual daily speech; native speakers typically say 搬家 (bān jiā) for everyday moving. 徙居 is more common in written Chinese, official documents, or formal announcements, and often implies intentionality, permanence, and sometimes social or structural significance.