head of state

leader of a nation (President, dictator, Prime Minister, etc.)

Head of state or Chief of state is the generic term for the individual or collective office that serves as the chief public representative of a monarchic or republican nation-state, federation, commonwealth or any other political state. His or her role generally includes personifying the continuity and legitimacy of the state and exercising the political powers, functions and duties granted the head of state in the country's constitution.
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Noun
1. the chief public representative of a country who may also be the head of government
(synonym) chief of state
(hypernym) representative
(hyponym) chancellor, premier, prime minister

head of state
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