R.abbr.1. rabbi2. rector3. riverr.abbr.1. rare2. retired3. rod (unit of length)4. ruble5. rupeeAmerican Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.r. abbreviation for 1. rare 2. (Printing, Lithography & Bookbinding) recto 3. (Units) Also: r rod (unit of length) 4. (Government, Politics & Diplomacy) ruled 5. (General Sporting Terms) cricket baseball run(s) R. or r.abbreviation for1. (Law) registered (trademark)2. right3. (Physical Geography) river4. (Currencies) roubleR. abbreviation for 1. (Judaism) rabbi 2. (Ecclesiastical Terms) rector 3. (Government, Politics & Diplomacy) Regina 4. (Government, Politics & Diplomacy) Republican 5. (Ecclesiastical Terms) response (in Christian liturgy) 6. (Government, Politics & Diplomacy) Rex 7. (Physical Geography) River 8. (Government, Politics & Diplomacy) Royal [(sense 3) Latin: Queen] [(sense 6) Latin: King]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014