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  • R.R.
    R.R.
    abbreviation
    railroad.
  • RR
    RR
    abbreviation
    (in the US and Canada) railroad

R.R.

American  

abbreviation

  1. railroad.

  2. Right Reverend.

  3. rural route.


RR British  

abbreviation

  1. (in the US and Canada) railroad

  2. Right Reverend

  3. (in the US and Canada) rural route

"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

Example Sentences

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Its announcement caught fire because the dire wolf was a species depicted in the TV series “Game of Thrones” — indeed, part of the company’s publicity campaign featured a shot of George R.R.

From Los Angeles Times • May 21, 2026

‘A Knight of the Seven Kingdoms’ showrunner Ira Parker discusses the finale, adapting ‘Dunk and Egg,’ working with George R.R.

From Los Angeles Times • Mar. 3, 2026

Shortchanged viewers vociferously complained – including author and executive producer George R.R.

From Salon • Jan. 17, 2026

The argument of training as copyright infringement has managed to advance there as of Monday, thanks to output from ChatGPT that appeared to be mighty similar to George R.R.

From Slate • Nov. 3, 2025

It covers the same ground as De R.R. iii.-v.

From The Student's Companion to Latin Authors by Middleton, George

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