Source : Webster's Revised Unabridged Dictionary (1913)

Russian \Rus"sian\ (? or ?; 277), a.
   Of or pertaining to Russia, its inhabitants, or language. --
   n. A native or inhabitant of Russia; the language of Russia.

   {Russian bath}. See under {Bath}.

Source : WordNet®

Russian
     n 1: a native or inhabitant of Russia
     2: the Slavic language that is the official language of Russia

Russian
     adj : of or pertaining to or characteristic of Russia or its
           people or culture or language; "Russian dancing"