| Abbreviation | Definition |
|---|---|
| MMV | Manga Music Video |
| MMV | Mexican Music Video |
| MMVP | Master of Music in Vocal Performance |
| MMYO | Mainly Mozart Youth Orchestra |
| MMYO | Mid Maine Youth Orchestra |
| MN | Music Normal |
| MNBB | Mauvaises Nouvelles Blues Band |
| MNBB | Monday Night Big Band |
| MNCE | Mad Noise Cutting Edge |
| MNDR | Mndr |
| MNMBS | Mid North Michigan Blues Society |
| MOA | Moments of Alwaysness (Tomorrow x Together's fandom name) |
| MOAB | Mankatos Only Area Band |
| MOAB | Mother Of All the Best |
| MOAM | Musicians on a Mission |
| MOB | Mad Owl Band |
| MOB | Marching Owl Band |
| MOB | Mighty Owl Band |
| MOB | Music Over Business |
| MOB | Musicians Of Broadjam |