Definition of Russianism in US English:

Russianism

noun

  • 1A characteristically Russian word, phrase, or idiom, especially when used in another language.

  • 2As a mass noun: the use of Russianisms or Russianized language.

  • 3Attachment to or support for Russia and Russian political or cultural ascendancy.

  • 4Russian character, spirit, or quality.

  • 5A Russian characteristic or custom.

  • 6Soviet communism as practised by the Russians.

Origin

Early 19th century. From Russian + -ism. Compare slightly later Russism and the foreign-language nouns cited at that entry.