| Acronym | Definition |
|---|
| SMN | Summoner (Final Fantasy, gaming) |
| SMN | Servicio Meteorologico Nacional (Spanish: National Meteorological Service) |
| SMN | Santa Maria Novella (church and main train station, Florence, Italy) |
| SMN | Survival Motor Neuron |
| SMN | Seaman |
| SMN | Shaman (Mic-O-Say, Heart of America Council, Boy Scouts of America) |
| SMN | Scientific and Medical Network |
| SMN | Small Nuclear Ribonucleoprotein Polypeptide N |
| SMN | Société Métallurgique de Normandie (French: Metallurgic Company of Normandy; 1912-1993) |
| SMN | Société Morbihannaise de Navigation (French cruise company) |
| SMN | Système Multilatéral de Négociation (French: Multilateral Trading System) |
| SMN | Short Message Networks |
| SMN | Société Méditerranéenne de Nettoiement (French: Mediterranean Cleanup Corporation; France) |
| SMN | Société Marocaine de Nutrition (French) |
| SMN | Service de Métrologie Nucléaire (French: Nuclear Metrology Service; Belgium) |
| SMN | Software Modification Notice |
| SMN | Space Mapping-based Neuromodeling |
| SMN | Spot Market Network (Model) |
| SMN | Senior Ministries Network |
| SMN | Société Musicale Normande (French: Music Society of Normandy; France) |
| SMN | Small and Midsize Network |
| SMN | Signalisation Moléculaire et Neurodégénérescence (French: Molecular Signaling and Neurodegeneration; University of Strasbourg; France) |
| SMN | Static Mesh Network (Sprint) |
| SMN | Société de Maintenance et de Négoce (French: Society of Maintenance and Trading) |
| SMN | Smoky Mountain News (North Carolina) |
| SMN | Shoot Me Now |
| SMN | Simple Multicast Network |