| Abbreviation | Definition |
|---|---|
| MCJ | Midwest Conservative Journal |
| MDJ | Marietta Daily Journal |
| MDJ | Medical Digest Journal |
| MedArch | Mediterranean Archaeology |
| MEIJ | Mechanical Engineering An International Journal |
| MEJ | Mathematics Education Journal |
| MEJ | Medical Equipment Journal of Japan |
| MEJ | Middle Earth Journal |
| MEJ | Middle East Journal |
| MEJ | Minnesota English Journal |
| MEJAL | Middle East Journal of Applied Linguistics |
| MELJ | Michigan Environmental Law Journal |
| MFJ | Millennium Film Journal |
| MFJ | Molecular Frontiers Journal |
| MFJ | Municipal Finance Journal |
| MFPJ | MindForth Programming Journal |
| MHJ | Ministry Health Journal |
| MHJ | Minnesota Hockey Journal |
| MHR | Mediterranean Historical Review |
| MI | Main Idea |