Definition of "Baltic" :

noun: a branch of the Indo-European family of languages related to the Slavonic languages; Baltic languages have preserved many archaic features that are believed to have existed in Proto-Indo European

noun: a sea in northern Europe; stronghold of the Russian navy

adjective: of or near or on the Baltic Sea

"The Baltic republics."

adjective: of or pertaining to or characteristic of the Baltic States or their peoples or languages