| Acronym | Definition |
|---|
| MRJ➣Mitsubishi Regional Jet |
| MRJ➣Macintosh Runtime for Java |
| MRJ➣Men of Reform Judaism (est. 1926; New York, NY; formerly National Federation of Temple Brotherhoods) |
| MRJ➣Macintosh OS Runtime for Java |
| MRJ➣Montague Rhodes James (ghost story writer) |
| MRJ➣Marine Rescue Japan |
| MRJ➣Mensa Research Journal (Mensa Education and Research Foundation) |
| MRJ➣Maximally Random-Jammed |