Source : Webster's Revised Unabridged Dictionary (1913)

Lithuanian \Lith`u*a"ni*an\, a.
   Of or pertaining to Lithuania (formerly a principality united
   with Poland, but now Russian and Prussian territory).

Lithuanian \Lith`u*a"ni*an\, n.
   A native, or one of the people, of Lithuania; also, the
   language of the Lithuanian people.

Source : WordNet®

Lithuanian
     adj : of or relating to or characteristic of Lithuania or its
           people or language

Lithuanian
     n 1: a native or inhabitant of Lithuania
     2: the official language of Lithuania; belongs to the Baltic
        branch of Indo European