| Acronym | Definition |
|---|
| RN | Registered Nurse |
| RN | Rio Grande do Norte (Brazil) |
| RN | Right Now |
| RN | Route Nationale (French road) |
| RN | Rio Negro (Argentina province, airline code) |
| RN | Radon |
| RN | Runny Nose |
| RN | Real Nurse |
| RN | Registry Number |
| RN | Renovacion Nacional (National Renewal, Chile) |
| RN | Royal Navy (British) |
| RN | Random Number |
| RN | Radio Nederland (Dutch international broadcast service) |
| RN | Roman Numerals |
| RN | Rimini, Italy |
| RN | Ressources Naturelles (French: Natural Resources) |
| RN | Release Note (software updates) |
| RN | Routing Number (SS7) |
| RN | Rufnummer (telephone number) |
| RN | Reynolds Number (Naval architecture) |
| RN | Radio Nigeria |
| RN | Ruta Nacional (Spanish: national route) |
| RN | Round Nose |
| RN | Radio Nikkei (Japan) |
| RN | Radiological-Nuclear |
| RN | Resistencia Nacional (El Salvador) |
| RN | Reggae Night |
| RN | River Network |
| RN | RJR Nabisco (former stock symbol; now delisted) |
| RN | Régistre National (French: National Register; Belgium) |
| RN | Rockstar North |
| RN | Regional Node |
| RN | Radio Numérique (French: Digital Radio) |
| RN | Residential Nurse |
| RN | Resource Node |
| RN | Rodoviaria Nacional (Portuguese National Bus Service) |
| RN | Radar Navigator |
| RN | Revision Notice |
| RN | Radio Nodes (LMDS) |
| RN | Reachable Node |
| RN | Regency Net |
| RN | Rearendis Numbicitis (motorcycle riding malady) :-) |
| RN | Real Nighttime |
| RN | US Revenue Stamped Paper (Scott Catalogue prefix; philately) |
| RN | RealName brand (Centraal) |