designating or of the Slavic alphabet traditionally attributed to Saint Cyril, 9th cent. apostle to the Slavs: in modified form, it is still used in Russia, Bulgaria, and other Slavic countries
Of or being any of the alphabets based on Glagolitic and used for certain Slavic languages, such as Russian.
Origin of CyrillicInvention incorrectly attributed to Saint Cyril.
- The Cyrillic alphabet or writing system.