| Abbreviation | Definition |
|---|---|
| MMLD | Merchant Mariners Licensing and Documentation |
| MMPV | Marine Multi-Purpose Vehicle |
| MMPV | Medium Mine Protected Vehicle |
| MMS | Maintenance Management System |
| MMSI | Maritime Mobile Service Identity |
| MMT | Million Metric Tons |
| MMTC | Midwest Motorcycle Training Center |
| MMTF | Multi Modal Transportation Facility |
| MMTI | Major Metropolitan Transportation Investment |
| MMTI | Marine Market Transformation Initiative |
| MMTL | Marine Mammal Transportation Licences |
| MMUT | Mobility Measurement in Urban Transportation |
| MMV | Mileage May Vary |
| MMV | Military Millennia Vehicle |
| MMV | Mobile Mounted Vehicle |
| MMVA | Maryland Motor Vehicle Administration |
| MMYY525 | Credit card expiration date |
| MMZ | Mile Marker Zero |
| MMZ | Mile Marker Zero Band |
| MNA | Master of NAvigation |