居家 (jū jiā) literally combines 居 (jū), meaning 'to reside' or 'to dwell', and 家 (jiā), meaning 'home' or 'family'. Together, it describes activities, arrangements, or states centered on the home environment. As an adjective, it modifies nouns to indicate something is home-based—such as 居家办公 (working from home) or 居家养老 (aging in place). As a noun, it can refer to the act or practice of staying at home for daily life, often implying intentionality and routine rather than mere absence from elsewhere.

This term carries a neutral-to-positive connotation in modern usage, especially in contexts like remote work, home healthcare, or domestic self-sufficiency. It’s commonly used in official announcements, media reports, and everyday conversation when describing lifestyle choices or public health measures that emphasize remaining at home for safety, convenience, or care.