supreme leader

Short definition from Wiktionary

Noun

1. 1
   Alternative letter-case form of Supreme Leader.
2. 2
   The head of state and commander-in-chief of the entire armed forces of the Islamic Republic of Iran, with the authority to dismiss the Iranian president. The Supreme Leader is also the highest-ranking spiritual leader in Iran.
3. 3
   The highest-ranking member of a country, who has absolute power.