1. Old Ruthenian - Adjective
2. Old Ruthenian - Proper noun
a more detailed view of East Slavic language history
Old Ruthenian
(historical) A descendent of the Old East Slavic language, a language used in the 15th to 18th centuries in the Grand Duchy of Lithuania and Cossack state, ancestor of Belarusian, Rusyn, and Ukrainian. It contrasts with the Middle Russian language or early modern Russian language of Muscovy.
Synonyms: Ruthenian, (chiefly Russian perspective) West Russian, (Ukrainian perspective) Middle Ukrainian, (Belarusian perspective) Middle Belarusian
Old Ruthenian (not comparable)
Of or related to Old Ruthenia.