denoting the alphabet used by many Slavic peoples, chiefly those with a historical allegiance to the Orthodox Church. Ultimately derived from Greek uncials, it is now used for Russian, Bulgarian, Serbian, Ukrainian, and some other Slavic languages.
the Cyrillic alphabet.
early 19th century: named after St Cyril (see Cyril, St)
Cyrillic in other Oxford dictionaries
Definition of Cyrillic in the US English dictionary