Of or pertaining to Lithuania (formerly a principality united with Poland, then part of the Soviet Union, but since 1992 an independent nation). [1913 Webster]
lithuanian, n.
A native, or one of the people, of Lithuania; also, the language of the Lithuanian people. [1913 Webster]
lithuanian, n. & adj.
--n.
1 a a native of Lithuania, a Baltic republic of the USSR. b a person of Lithuanian descent.
2 the language of Lithuania.
--adj. of or relating to Lithuania or its people or language.