📒 a person who works in an office, working for another person, dealing with mail and phone calls, keeping records, arranging meetings with people, etc.
📒 an official of a club, society, etc. who deals with mail, keeping records and making business arrangements
📒 (in the UK) the head of an important government department
📒 the head of a government department, chosen by the president
📒 an assistant of a government minister, an ambassador, etc.