someone who works in an office, writing letters, making phone calls, and arranging meetings for a person or for an organization

My secretary will phone you to arrange a meeting. 我的秘书会打电话给你安排会议。

the member of a committee of an organization, club, etc. who keeps records of meetings, sends letters, emails, etc.

The three elected members of the committee are the chair, secretary, and treasurer. 委员会内有三个通过竞选得到的职位：主席、秘书和财务主管。

an official who has responsibility for the general management of an organization

The company secretary has written to all the shareholders to apologize for the mistake. 公司的文书已就这个错误向所有股东写信致歉了。

a Secretary of State

the Foreign Secretary 外交大臣

the Home Secretary 内政大臣

the head of a government department, chosen by the president and not a member of a law-making group

the Secretary of Health and Human Services 卫生和福利部部长