sea in N Europe, south & east of the Scandinavian Peninsula, west of the Baltic States, & north of Poland, connecting with the North Sea through the Kattegat & Skagerrak: 147,500 sq mi (382,024 sq km)
See Baltic Sea in American Heritage Dictionary 4
An arm of the Atlantic Ocean in northern Europe bounded by Denmark, Sweden, Finland, Estonia, Latvia, Lithuania, Poland, and Germany. It opens to the North Sea via channels and canals, is mostly shallow, with relatively low salinity, and often freezes for three to five months of the year.