Definition of Cyril, St. in English:

Cyril, St.

Pronunciation /ˌsānt ˈsirəl/ /ˌseɪnt ˈsɪrəl/

proper noun

  • (826–869), Greek missionary. The invention of the Cyrillic alphabet is named for him. Feast day (in the Eastern Church) May 11; (in the Western Church) February 14.