| Abbreviation | Definition |
|---|---|
| SE | Support Equipment |
| SE | Synthetic Environment |
| SE | System Engineer |
| SE&I | Systems Engineering and Integration |
| SEA | Southeast Asia |
| SEA | Strategic Enterprise Architecture |
| SEA | Syrian Electronic Army |
| SEABEE | Construction Battalion |
| SEABEE | Navy Construction Engineer |
| SEAC | Special Equipment Aramid Composite |
| SEACOP | Strategic Sealift Contingency Planning System |
| SEAD | Subtle Energy Activation Device |
| SEAD | Suppression of Enemy Air Defenses |
| SEAD | Supression Of Enemy Air Defenses |
| SEAF | STOW-E Evaluation and Analysis Facility |
| SEAL | SEa -Air-Land Combat Team |
| SEAL | Sea-Air-Land Team |
| SEAL | Submarine Escape Action Levels |
| SEALOC | SEA Lines Of Communication |
| SEAM | Second Echelon Attack Missile |