Katharevousa (, (Modern Greek: /kaθaˈrevusa/, lit. "pure [language]"), is a form of the Modern Greek language conceived in the early 19th century as a compromise between Ancient Greek and the Demotic Greek of the time. Originally, it was widely used both for literary and official purposes, though seldom in daily language. In the 20th century, it was increasingly adopted for official and formal purposes, until Demotic Greek became the official language of Greece in 1976 and Andreas Papandreou abolished the polytonic system of writing in 1981.

Katharevousa (, (Modern Greek: /kaθaˈrevusa/, lit. "pure [language]"), is a form of the Modern Greek language conceived in the early 19th century as a compromise between Ancient Greek and the Demotic Greek of the time. Originally, it was widely used both for literary and official purposes, though seldom in daily language. In the 20th century, it was increasingly adopted for official and formal purposes, until Demotic Greek became the official language of Greece in 1976 and Andreas Papandreou abolished the polytonic system of writing in 1981.