RR

Short definition from Wiktionary

Noun

1. 1
   Initialism of railroad.
2. 2
   Initialism of road race.
3. 3
   Abbreviation of rear, where brevity is desired.
4. 4
   Initialism of right rear, a location in a square or rectangular layout such as the tires on an automobile or the heating elements on a stovetop.
5. 5
   Initialism of Rolls-Royce.
6. 6
   Initialism of reverse racism.
7. 7
   Initialism of real reality.
8. 8
   Initialism of relative risk.
9. 9
   Initialism of rural route used when addressing mail.
10. 10
    Initialism of Riva-Roccin, a blood pressure measurer device.
11. 11
    Initialism of role reversal.
12. 12
    Initialism of resource record.

Proper noun

1. 1
   Abbreviation of Roraima: a state of Brazil.
2. 2
   Initialism of Rocky River: a city in Ohio, United States.

Verb

1. 1
   (from the status code used in the GDS) reconfirm / reconfirmed.