| Abbreviation | Definition |
|---|---|
| ACE | Adaptive Communication Environment |
| ACE | Adaptive Correlation Evaluator |
| ACE | Aerobatic Competency Evaluator |
| ACE | Air Combat Element |
| ACE | Air Force Airborne Command Element |
| ACE | Airborne Command Element |
| ACE | Airborne Communications Electronics |
| ACE | Allied Command Europe |
| ACE | Analysis and Control Element |
| ACE | Armored Combat Earth-mover |
| ACE | Armored Combat Excavator |
| ACE | Army Combat Earth-mover |
| ACE | ASAS (All-Source Analysis System) Collateral Enclave |
| ACE | Assistant Chief of Engineers |
| ACE | Avi??n de Combate Europeo |
| ACE | Aviation Career Education |
| ACE | Aviation Combat Element |
| ACE | Aviation Combat Element, United States Marine Corps |
| ACE | Aviation Council Emeritus |
| ACEB | Army Clothing and Equipment Board |