| Acronym | Definition |
|---|
| RNR | Rock 'N Roll |
| RNR | Royal Naval Reserve |
| RNR | Ribonucleotide Reductase |
| RNR | Receiver not Ready |
| RNR | Réserves Naturelles Régionales (French: Local Nature Reserve) |
| RNR | Receive Not Ready (ITU-T; ISDN) |
| RNR | Round Norfolk Relay (race; UK) |
| RNR | Roles and Responsibilities (employment) |
| RNR | Rest and Relaxation |
| RNR | Royal Newfoundland Regiment |
| RNR | Réacteur à Neutrons Rapides (French: Fast Neutron Reactor; nuclear power) |
| RNR | Refuse and Resist! (est. 1987) |
| RNR | Read No Reply |
| RNR | Remove and Replace |
| RNR | Rest and Recreation |
| RNR | Risk-Need-Responsivity (criminal psychology) |
| RNR | Radio News Release (news story) |
| RNR | Registry of Nursing Research |
| RNR | Rate Not Reported |
| RNR | Rapid Nasogastric Rehydration |
| RNR | Ralph 'n' Riches (Bridgeport, CT) |
| RNR | Research News Reporter |
| RNR | Reinhold-Nägele-Realschule (German secondary school) |
| RNR | Rock and Ride |
| RNR | Reward and Recognition |
| RNR | Random Noise Radar |
| RNR | Ring No Reply |
| RNR | Roman Revolutionaries (band) |
| RNR | Registered Nurses, Retired, Inc. |
| RNR | Rassemblement National Républicain (French: Republican National Rally) |
| RNR | Rhein-Neckar Region (Germany) |
| RNR | Response Not Required |
| RNR | Right-Now-Retailing (HP technology for retailers) |
| RNR | Rupert and Riley (gaming) |
| RNR | Revue Nucléaire de Russie (French: Russian Nuclear Journal) |