Old geog. inits.

• Rus., e.g., formerly
• Russian state: Abbr.
• Part of an empire up to 1991: Abbr.
• Ukr. or Lith., once
• Union member of the 20th century, for short
• Armenia, e.g
• 40 Across was one: Abbr.
• Any of the Baltic states, once: Abbr.
• Georgia, once, initially

Wikipedia Word definitions in Wikipedia
SSR may refer to: