| Acronym | Definition |
|---|
| IDF | Israel Defense Forces |
| IDF | Intel Developer Forum |
| IDF | Intermediate Distribution Frame |
| IDF | Ile De France (region near Paris, France) |
| IDF | International Diabetes Federation |
| IDF | Inverse Document Frequency (datamining) |
| IDF | Idiopathic Pulmonary Fibrosis |
| IDF | Indirect Fire |
| IDF | International Dairy Federation |
| IDF | Immune Deficiency Foundation |
| IDF | International Downhill Federation (sports) |
| IDF | Institutional Development Fund (World Bank; est. 1992) |
| IDF | Indigenous Defense Fighter |
| IDF | Indigenous Defense Fighter (Taiwan) |
| IDF | International DOI (Digital Object Identifier) Foundation |
| IDF | Input Data Format |
| IDF | Instrument Definition File |
| IDF | Intel Developer'S Forum |
| IDF | Image Definition File |
| IDF | Intermediate Data Format |
| IDF | Indigenous Defence Fighter (Ching-Kuo,Taiwan) |
| IDF | Inflow Design Flood (civil engineering) |
| IDF | Industry Development Fund (various locations) |
| IDF | Instrument Definition File (computing) |
| IDF | Iceland Defense Force |
| IDF | Integrated Development Framework (various organizations) |
| IDF | Interface Device |
| IDF | Intensity Duration Frequency (hydrology) |
| IDF | Independence Fleet (Star Trek) |
| IDF | Irish Defence Forces |
| IDF | International Development Fund |
| IDF | Integer-Controlled Data Flow |
| IDF | Information Distribution Facility |
| IDF | Internet Dental Forum |
| IDF | Immun Defekt Foreningen (Denmark) |
| IDF | Islamic Defense Front |
| IDF | Institute for a Democratic Future (Washington state) |
| IDF | Item Data File |
| IDF | Inertial Dampening Field (Star Trek) |
| IDF | Intermediate Data File |
| IDF | Islamic Dawah Foundation |
| IDF | Interceptor Day Fighter |
| IDF | Instrument Data File |
| IDF | Installation Data File |
| IDF | Installation Detention Facility |
| IDF | Imagery Dissemination Facility |
| IDF | Imbalance Design Fraction (aviation) |
| IDF | Interamerica Data Florida, LLC (Doral, FL) |
| IDF | Invalid Data Flag (Nortel) |
| IDF | Issaan Development Foundation |
| IDF | Integrated Delivery Function |
| IDF | Indemnity Discount Factor (insurance) |
| IDF | Itron Delimited Format |
| IDF | Intelligent Document Factory |
| IDF | Ineffective Direct Fire |
| IDF | Instruction and Dictionary Finalization |
| IDF | International Disaggregate Forecast (Sprint) |
| IDF | Issue Documentation Form (various organizations) |
| IDF | Initial Distribution File |
| IDF | Integrated Demand Forecast (Sprint) |
| IDF | Intermediate Distribution(al) Facility (networking) |