| Abbreviation | Definition |
|---|---|
| MCA | Mesdemeanant Corrections Association |
| MCBA | Maricopa County Bar Association |
| MCBA | Middlesex County Bar Association |
| MCCM | Modular Crowd Control Munition |
| MCI | Massachusetts Correctional Institute |
| MCI | Massachusetts Correctional Institution |
| MCL | Michigan Compiled Laws |
| MCL | My Certified License |
| MCLE | Mandatory Continuing Legal Education |
| MCM | Manual for Courts-Martial |
| MCM | Midnight Corsair Mafia |
| MCU | Major Crime Unit |
| MD | Majorly Demented |
| MD | Malignant Denial |
| MD | Mandatory Disclosure |
| MD | Marque Deposee |
| MD | Mentally Deranged |
| MD | Morally Deficient |
| MD | More Dope |
| MD | Mucho Dough |