| Abbreviation | Definition |
|---|---|
| REJO | Revised Engineering Job Order |
| REL | Release |
| REL | RELigion |
| RELCAN | Releasable to Canada |
| RELMS | Rapidly Erectable Light Mobilization Structures |
| RELNAV | elative Navigation |
| RELNAV | Relative Navigation |
| REMBASS | Remotely Monitored Battlefield Sensor System |
| REMF | Rear Echelon Mother Figure |
| REMF | Reliable Everyday Military Friends |
| REMODNE | Reception and Onward Movement of DoD-Sponsored Non-Combatant Evacuees |
| REMT | Regional Emergency Management Team |
| REMUS | Remote Environmental Monitoring Unit System |
| REN | Re-Name |
| REN | Renown |
| REO | Readiness Engineering Office |
| REO | Red Elusive One |
| REP | Repeat |
| REP | Reply |
| REP | Representative |