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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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They are, at the end of a Sunday night, high fantasy spectacles based on a fictional land with a complex history that was created by author George R.R.

From Salon ● Jun. 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

How is it like to work with George R.R.

From Los Angeles Times ● Feb. 22, 2026

This is the same company that “brought back” the ice-age dire wolf with financial help from Game of Thrones author George R.R.

From Slate ● Aug. 8, 2025

After the partnership is formed, your partner writes to Orr & Locket, 14 W. Randolph St., Chicago, Ill., ordering the following to be shipped by Pennsylvania R.R.:

From Business English A Practice Book by Rose Buhlig

It also sits relatively far from the center of the Milky Way and contains an extraordinary population of RR Lyrae variable stars.

From Science Daily ● Jul. 5, 2026

Looking ahead: “The security of that steady paycheck gives consumers the confidence to keep spending,” said Chip West, retail strategist at business-advisory firm RR Donnelley.

From MarketWatch ● Jun. 4, 2026

The stage prequel will tell an original story, based on new material from author and executive producer George RR Martin.

From BBC ● Feb. 18, 2026

Rolls-Royce RR -0.30%decrease; red down pointing triangle said strong demand across all its business areas means it is on track to meet its full-year targets.

From The Wall Street Journal ● Nov. 13, 2025

Flexibilia.—Dicyclica in which proximal brachials are incorporated in the dorsal cup, either by their own sides, or by interbrachials, or by a finely plated skin, but never rigidly; plates may occur between RR.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various

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