Russian (noun)

1. A person from Russia, or of Russian descent.
2. The East Slavic language spoken in Russia, also spoken in Ukraine and Belarus, and widely spoken in other countries.

Origin:

Late 16th century: from french russe, from medieval latin rus(s)us, from old east slavic rus, the name of the medieval state of the eastern slavs, centred on kiev.

Examples:

1. She is a Russian citizen.
2. He is of Russian descent.
3. They speak Russian at home.
4. The Russian language is spoken by over 260 million people.
5. Russian literature is known for its great authors such as Dostoevsky and Tolstoy.