look up any word, like hipster:
 
1.
A misconceived word, as Poland was never officially a part of Soviet Union, and thus was named 'People's Republic of Poland', during the communist reign. Oh, and even if, it would have been 'Polish SSR'.
- Do you know when the Poland SSR ceased to exist?

- Poland what? Oh, you must mean the People's Republic of Poland! It officially fell on 31 December, 1989.
by Guderheinz August 08, 2010
 
2.
The central european country of Poland under the control of the Soviet Union after World War 2.
The USSR took Poland from Nazi rule and established it as a territiory called Poland SSR.
by ThePolishWoj December 06, 2009