deputy head; vice chief; deputy director
General term for the second-in-command in an organization, team, or department.
He serves as the deputy chief of the volunteer fire corps.
The vice chief took over the proceedings of the meeting.
Specific naval term for the second-in-command of a ship or unit.
When the captain is absent, the executive officer takes command.
deputy secretary; deputy director
Compound of 副 (vice-, deputy) and 長 (chief, head).