To act as president; to do presidential duties.
Primary leader of a corporation. Not to be confused with CEO, which is a related but separate position that is sometimes held by a different person.
In presidential republics, the head of government and head of state.
The head of state of a republic.
A person presiding over a meeting; a chair, presiding officer, presider.
Someone who presides; a leader, an overseer, a president.