| Abbreviation | Definition |
|---|---|
| MRA | Michigan Reading Association |
| MRA | Michigan Reading Association's |
| MRA | Michigan Restaurant Association |
| MRA | Midwestern Representatives Association |
| MRA | MN Rodeo Association |
| MRA | Mountain Rescue Association |
| MRAA | Marine Retailers Association of the Americas |
| MRAA | Metropolitan Richmond Artists Association |
| MRAA | Morgan Ross Athletic Association |
| MRAEF | Montana Restaurant Association Education Foundation |
| MRAJ | Motor Repairers Association of Jamaica |
| MRAN | Motorcycle Racing Association of Nevada |
| MRBA | Market Research Benevolent Association |
| MRBA | Michigan Road Builders Association |
| MRBA | Minnesota River Builders Association |
| MRBA | Missisquoi River Basin Association |
| MRBA | Mississippi Road Builders Association |
| MRBA | Missouri River Bluffs Association |
| MRBA | MN River Builders Association |
| MRBA | Montana Rockies Bluegrass Association |