river in central Europe, flowing north through Czech Republic & Poland into the Baltic: c. 560 mi (901 km): it forms, with the Neisse, the boundary () between Germany & Poland
See Oder in American Heritage Dictionary 4
(ōˈdər)
A river of central Europe flowing about 904 km (562 mi) from northeast Czech Republic through Poland and Germany to the Baltic Sea. It is a major waterway of Eastern Europe.