队长 (duì zhǎng) literally combines 队 (duì), meaning 'team' or 'group', and 长 (zhǎng), meaning 'leader' or 'head'. Together, it refers to the person in charge of a team — whether in sports, work, school projects, or volunteer activities. It emphasizes responsibility, authority, and coordination within a collective structure.

This term is neutral in register and widely used across formal and informal contexts. Unlike English 'captain', which often implies sports or military roles, 队长 applies more broadly — for example, a hiking group’s leader, a student debate team’s organizer, or a neighborhood volunteer squad’s coordinator. It does not imply rank by seniority alone but by designated leadership role. The character 长 here is pronounced zhǎng (not cháng), reflecting its meaning as 'chief', distinct from the adjective 'long'.