| Abbreviation | Definition |
|---|---|
| MDML | Metropolitan Detroit Musicians League |
| MDMT | Martyn Donaldson Music Trust |
| MDNA | Madonna |
| MDND | Music Dance N Drama |
| MDP | Midi Digital Percussion |
| MDR | Music Deserves Respect |
| MDSO | Millikin Decatur Symphony Orchestra |
| MDWT | Mi Delirio World Tour |
| MDWTR | Mi Delirio World Tour Reloaded |
| MEAN | Midi Electronica Audio Noise |
| MEBA | Music and Entertainment Business Association |
| MECA | Music Education Center of America |
| MEDS | Medsmusic Experiment Development System |
| MEE | Music Enjoyment for Everyone |
| MEGA | Music English Game Art |
| MEI | Musical Encoding Initiative |
| MEISA | Music and Entertainment Industry Student Association |
| MELE | Music Entertainment Learning Experience |
| MEMA | Macedonian Electroacoustic Music Association |
| MEMA | Motivation Encouragement and Music Appreciation |