| Acronym | Definition |
|---|
| IFD | Image File Directory |
| IFD | Impôt Fédéral Direct (French: Direct Federal Tax; Switzerland) |
| IFD | Interface Device |
| IFD | Ideal Free Distribution (behavioural ecology) |
| IFD | Indianapolis Fire Department |
| IFD | Indentation Force Deflection (foam) |
| IFD | Ideas From the Deep (gaming software) |
| IFD | Information Flow Diagram |
| IFD | I Fight Dragons (band; Chicago, IL) |
| IFD | Internet-Facing Deployment |
| IFD | International Framework for Dictionaries (objectlibraries construction) |
| IFD | Israeli Folk Dance |
| IFD | Intensity Frequency Duration (Australian stormwater design) |
| IFD | International Floral Distributors |
| IFD | Internal Fault Detector (distribution transformers) |
| IFD | Iraqi Forum for Democracy (since 1998; Ann Arbor, Michigan) |
| IFD | Integrated Feasibility Demonstration |
| IFD | International Friendship Day |
| IFD | Ideas for Design |
| IFD | Industrial Facilities Discharge File (EPA) |
| IFD | International Federation for Documentation |
| IFD | Industrie-Forum Diabetes |
| IFD | Items for Discussion |
| IFD | In-Flight Disconnect |
| IFD | Invariant Factor Decomposition |
| IFD | Impurity-Free Disordering |
| IFD | Initial Fill Date |
| IFD | Irradiated Fuel Dismantling |
| IFD | Inter-Field Distance |
| IFD | Interface Functional Description |
| IFD | Independent Funeral Director's College Ltd (UK) |
| IFD | Intelligence Fusion Demonstration |
| IFD | Issue for Design |
| IFD | Industrial Fluid Dynamics |
| IFD | Inside Frame Dimension |
| IFD | Index of Fuel Diversification |