| Abbreviation | Definition |
|---|---|
| MEB | Marine Expeditionary Brigade |
| MEB | Medical Evaluation Board |
| MEBITT | Medical Evaluation Board Internal Tracking Tool |
| MEBU | Mission Essential Backup |
| MEC | Medium Endurance Cutter |
| MEC | Middle East Coalition |
| MEC | Minimum Effective Concentration |
| MECCANS | Military Emergency Communications Control Activation Network System |
| MECH | Mechanically Enhanced Cybernetic Humanoid |
| MECH | Mechanized |
| MECI | Mission Essential Contingency Items |
| MED | Manipulative Electronic Deception |
| MED | Medical |
| MED | Medical Eligibility Determination |
| MED | Mediterranean |
| MED | Medium |
| MED | Message Element Dictionary |
| MED | The Mediterranean Sea |
| MEDA | Military Emergency Diversion Airfield |
| MEDAC | Military Economic Development Advisory Committee |