| Acronym | Definition |
|---|
| SSJ | Sisters of St. Joseph |
| SSJ | Syndrome de Stevens-Johnson (French: Stevens-Johnson Syndrome) |
| SSJ | Super Saiya-Jin (Dragon Ball Z and Dragon Ball GT) |
| SSJ | Segelsallskapet I Jakobstad (yacht club in Jakobstad-Pietarsaari, Finland) |
| SSJ | Service de Santé de la Jeunesse (French: Youth Health Service; Switzerland) |
| SSJ | Southside Johnny (band) |
| SSJ | Sukhoi Super Jet |
| SSJ | Single Source Justification (various organizations) |
| SSJ | Society of St. John (religious order) |
| SSJ | Sociology of Sport Journal |
| SSJ | Students for Social Justice |
| SSJ | Server-Side Java |
| SSJ | Saints Simon and Jude (church and school) |
| SSJ | Sole-Source Justification |
| SSJ | Stochastic Simulation in Java |
| SSJ | Stranka Srpskog Jedinstva (Party of Serb Unity, Serbia and Montenegro) |
| SSJ | Sector San Juan (US Coast Guard) |
| SSJ | Sandnessjoen, Norway - Stokka (Airport Code) |
| SSJ | Sedimentological Society of Japan |
| SSJ | Spiritual Strategic Journey |
| SSJ | Shakespeare Society of Japan (literature) |
| SSJ | Stephen S Jemal (founder of SSJ Development LCC) |
| SSJ | Scratch Score du Jour (French: Scratch Score of the Day; golf) |
| SSJ | Self-Screening Jammer |
| SSJ | Swimming Science Journal |
| SSJ | Sarka, Sabaliauskas, Jankauskas (Lithuanian law firm) |
| SSJ | Single Sideband Jammer |
| SSJ | Strings of St John's (Ottawa, ON, Canada) |
| SSJ | St. Joseph's Society of the Sacred Heart, Josephites (religious order) |
| SSJ | SlantShack Jerky (Jersey City, NJ) |
| SSJ | South Side Jokers (street gang) |
| SSJ | Salop Saab and Jeep Ltd. (UK) |