| Abbreviation | Definition |
|---|---|
| MRAF | Marshal of the Royal Air Force |
| MRAF | Military Region Air Force |
| MRAP | Mine-Resistant Ambush Protected |
| MRAPV | Mine-Resistant Ambush-Protected Vehicle |
| MRASM | Medium Range Air Surface Missile |
| MRASM | Medium Range Air to Surface Missile |
| MRASM | Medium Range Air-to-Surface Missile |
| MRAT | Medical Radiobiology Advisory Team |
| MRB | Material Review Board |
| MRB | Medical Recruiting Brigade |
| MRBC | Multi-Role Bridge Company |
| MRBM | Medium Range Ballistic Missile |
| MRC | Major Regional Conflict |
| MRC | Map Reference Code |
| MRC | Materiel Release Confirmation |
| MRC | Militarized Reconfigurable Computer |
| MRCA | Military Radio Collectors Association |
| MRCA | Multi Role Combat Aircraft |
| MRCC | Military Rape Crisis Center (Boston, MA; est. 2006) |
| MRCI | Maximum Rescue Coverage Intercept |