head of state 
noun
The chief public representative of a country, such as a president or monarch, who may also be the head of government: a ceremonial head of state he was formally appointed as head of state...
- The president serves as the head of state and commander in chief of the armed forces.
- As long as the head of state is a president who is faithful to the constitution, fascism is harmless.
- Women own about one per cent of the world's property and make up less than five per cent of the heads of state and cabinet ministers.