What does RR stand for?

What does RR mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: RR.

We've found a total of 150 definitions for RR:

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"RR." Abbreviations.com. STANDS4 LLC, 2016. Web. 7 Dec. 2016. <http://www.abbreviations.com/RR>.