SSR

or S.S.R.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for ssr

SSR

abbreviation for
  1. (formerly) Soviet Socialist Republic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ssr

SSR

1926, from Russian, initialism for Sovetskaya Sotsialisticheskaya Respublika "Soviet Socialist Republic."

Online Etymology Dictionary, © 2010 Douglas Harper