An equivalent rank in other military forces.
The second lowest rank of a commissioned officer in the United States Army, Air Force, or Marine Corps, ranking above a second lieutenant and below a captain. The rank of first lieutenant is equivalent to the naval rank of lieutenant junior grade.
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.
To act as president; to do presidential duties.