| Acronym | Definition |
|---|
| ECAC➣Eastern College Athletic Conference |
| ECAC➣European Civil Aviation Conference |
| ECAC➣Enhanced Call Admission Control |
| ECAC➣Exceptional Children's Assistance Center (Davidson, NC, USA) |
| ECAC➣Evasion Conduct after Capture (US DoD) |
| ECAC➣Electromagnetic Compatibility Analysis Center |
| ECAC➣Expertise Comptable Commissariat aux Comptes (French: Chartered Accountant Statutory Auditors) |
| ECAC➣East Coast Australian Current |
| ECAC➣Estimated Cost At Completion |
| ECAC➣East Coast Armaments Complex |
| ECAC➣Energy Cost Adjustment Charge |
| ECAC➣Electromagnetic Compatibility and Analysis Center |
| ECAC➣Executive Committee for Academic Computing |
| ECAC➣Enhanced Counterair Capability (Army) |