noun
administration; government; conduct of state affairs
A somewhat formal, literary term for governing or managing the affairs of a nation. Often used in historical or political contexts.
彼は経世の才に恵まれていた。
He was blessed with a talent for statecraft.
経世済民の精神が改革の根底にあった。
The spirit of governing the world and relieving the people was at the root of the reforms.
From Chinese 經世／经世 (jīngshì), meaning 'to govern the world'. The Japanese reading is けいせい, using the on'yomi of the characters.