'席位' literally combines '席' (xí), meaning 'mat' or 'seat'—historically a floor mat used for sitting—and '位' (wèi), meaning 'position' or 'place'. Together, they form a formal noun meaning 'a seat' in a physical sense (e.g., at a conference table) or, more commonly, 'a position' in an official body like a legislature, committee, or board. It emphasizes formal allocation and institutional recognition—not just any seat, but one with authority, representation, or entitlement.

The term is frequently used in political, organizational, and academic contexts: e.g., '联合国席位' (a seat at the United Nations), '董事会席位' (a seat on the board of directors), or '学生代表席位' (a student representative position). It is rarely used for casual seating (like a chair in a café); for that, '座位' (zuòwèi) is appropriate. '席位' carries connotations of legitimacy, voting rights, and formal membership.