statesman; political leader
Refers to a person who governs a country with skill and wisdom, often implying a broad vision for national affairs. Slightly formal and somewhat dated; in modern contexts, 政治家 (せいじか) is more common for 'politician'.
He left his name in history as an outstanding statesman.
Compound of 経世 (けいせい, 'governing the world') and 家 (か, 'person'). The exact historical derivation is uncertain, but the term follows a common pattern for designating a specialist or expert.