MRRN
| Acronym | Definition |
|---|---|
| MRRN | Michigan Recruitment & Retention Network |
| MRRN | Middle Rhombencephalic Reticular Nucleus (neurology) |
| MRRN | Management Resource Reference Number |
| MRRN | Mlodziezowy Ruch Rycerstwa Niepokalanej (Polish: Militia Immaculata Youth Movement) |