| Acronym | Definition |
|---|
| IDEF | Interim Data Exchange Format |
| IDEF | Intrusion Detection Exchange Format |
| IDEF | Image Definition |
| IDEF | Icam Definition |
| IDEF | Integrated Data Engineering Facility |
| IDEF | Integrated Definition |
| IDEF | International Defence Industry Fair |
| IDEF | Intrusion Detection Exchange Format (IETF) |
| IDEF | Integrated Definition for Data Modeling (US DoD architecture framework) |
| IDEF | Integrated Definition Language |
| IDEF | International Digital Entertainment Festival |
| IDEF | Integration Definition Function |
| IDEF | ICAM Definition Methodology |
| IDEF | Integrated Definition Modeling Methodology |