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Definition 2024

(obsolete) The Russian language, when (possibly erroneously) considered to be mutually intelligible with the Ukrainian ("Little Russian") and Belarusian ("White Russian") languages.

Russian language, when considered mutually intelligble with Ukrainian and Belarusian

Russian: великору́сский язы́к m ‎(velikorússkij jazýk), великору́сский (ru) m ‎(velikorússkij) (язы́к); росси́йский язы́к m ‎(rossíjskij jazýk), росси́йский (ru) m ‎(rossíjskij) (язы́к, 18th century)