| Acronym | Definition |
|---|
| SMJ | Sony Music Japan |
| SMJ | Singapore Medical Journal (Singapore Medical Association) |
| SMJ | Strategic Management Journal |
| SMJ | Southern Medical Journal |
| SMJ | Service Municipal de La Jeunesse (French: Municipal Youth Service) |
| SMJ | subject matter jurisdiction |
| SMJ | Summary Judgment (legal term) |
| SMJ | Saber Marionette J (WinAMP skin) |
| SMJ | Space Media Japan Co., Ltd. (Japan) |
| SMJ | Scottish Medical Journal (Royal College of Physicians and Surgeons of Glasgow) |
| SMJ | Scatman John (singer) |
| SMJ | Super Multiple Junction (automotive wiring) |
| SMJ | Saudi Medical Journal |
| SMJ | Self-Monitoring Journal (weight loss) |
| SMJ | Union Nationale des Spécialistes En Matériels de Parcs et Jardins (French: National Union of Specialists In Equipment for Parks and Gardens) |
| SMJ | Scrap Metal Junkie (recycling resource) |
| SMJ | Société des Mines de Jouac (French: Jouac Mining Company; France) |
| SMJ | Songklanagarind Medical Journal (Prince of Songkla University, Thailand) |
| SMJ | Sweet Mother of Jesus |
| SMJ | Schönstatt-Mannes-Jugend (German religious initiative) |
| SMJ | Smartjack (Hekimian) |