Cyrillic has 4 different meanings across 3 categories:
Noun · Adjective · Proper Noun
an alphabet derived from the Greek alphabet and used for writing Slavic languages (Russian, Bulgarian, Serbian, Ukrainian, and some other Slavic languages)
relating to or written in the alphabet used for writing Slavic languages
"Cyrillic writing"
Denoting an alphabet devised for writing the Old Church Slavonic liturgical language, and its adaptations used for several languages of Eastern Europe and Asia; of or relating to this writing system.
The Cyrillic alphabet or writing system.