commander
nounUK /kəˈmɑːndə/
US /kəˈmændər/
A commander is a person who is in charge of a group, like soldiers or a ship.
The commander told the soldiers to stand in a line.
OTHER MEANINGS
2. An officer of high rank in the navy or air force.
The commander of the air base gave a speech.
3. A person who is an expert in a particular subject or activity.
She is a commander of the chess board.
4. A title given to a high-ranking member of some orders or groups.
He was made a commander of the royal order.