- Old Church Slavonic
- Old′ Church′ Slavon′ic(or Slav′ic) n.peo the oldest attested Slavic language, extant in a group of manuscripts written before c1100, largely scripture and liturgical translations that were the outcome of Cyril and Methodius's mission to the Moravian Slavs in 863Abbr.: OCS 2)•Etymology: 1875–80
From formal English to slang. 2014.