- the highest executive officer of a modern republic, as the chief executive of the United States: sworn in as the 56th president of Mexico.
- an officer appointed or elected to preside over an organized body of persons.
- the chief officer of a college, university, society, corporation, etc.
- a person who presides.
- the chief executive or head of state of a republic, esp of the US
- (in the US) the chief executive officer of a company, corporation, etc
- a person who presides over an assembly, meeting, etc
- the chief executive officer of certain establishments of higher education
