Definition of R abbreviation from the Oxford Advanced American Dictionary

     

    R

     abbreviation
    abbreviation
    NAmE//ɑr//
     
     
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  1. 1 R. (especially on maps) River R. Trask
  2. 2(also R.) (in politics in the U.S.) republican
  3. 3 used to show that no one younger than 17 will be allowed to see a particular movie unless an adult goes with them (the abbreviation forrestricted) compare G (1), NC-17, PG, PG-13
  4. 4roentgen see also R & B, R & D, R & R
See the Oxford Advanced Learner's Dictionary entry: R