| Acronym | Definition |
|---|
| IFR➣Instrument Flight Rules (aviation) |
| IFR➣International Fleet Review |
| IFR➣International Financing Review (Thomson Financial Limited, London, UK) |
| IFR➣Institute of Food Research (UK) |
| IFR➣Institut Fédératif de Recherche (Research's Federative Institute) |
| IFR➣Issue for Review |
| IFR➣Inherently Flame Retardant |
| IFR➣Interim Final Rule (FDA) |
| IFR➣In-Flight Refueling |
| IFR➣Instrument Flight Rule |
| IFR➣Interim Financial Reporting (accounting) |
| IFR➣Integral Fast Reactor (nuclear reactor) |
| IFR➣Increasing Failure Rate |
| IFR➣Internal Floating Roof (storage tanks) |
| IFR➣Interleaved Frame Recording |
| IFR➣Industrial Frame Router |
| IFR➣Isochronous Frame Reference |
| IFR➣Interactive Fax Response |
| IFR➣Iris Frame Relay |
| IFR➣Ideal Final Result (problem solving) |
| IFR➣International Federation of Robotics |
| IFR➣Interface Repository (CORBA) |
| IFR➣Infrared Receiver |
| IFR➣Infield Fly Rule (baseball) |
| IFR➣Institute for Fisheries Research |
| IFR➣Inspiratory Flow Rate |
| IFR➣Institute for Fisheries Resources |
| IFR➣Initial Flight Release (aviation) |
| IFR➣International Finals Rodeo |
| IFR➣Iron Fortified Rice (program; Philippines) |
| IFR➣Indoor Firing Range |
| IFR➣International Financial Review |
| IFR➣International Fellowship of Reconciliation (est. 1919) |
| IFR➣Interrupt Flag Register |
| IFR➣Instrumented Flux Return |
| IFR➣Interleaved Frame Recording (Video) |
| IFR➣In Frame Response |
| IFR➣In-Flight Report |
| IFR➣Institut für Religionspolitologie eV (Duisburg, Germany) |
| IFR➣Interior Furniture Resources (Harrisburg, PA) |
| IFR➣Induced Field Ratio |
| IFR➣Intrinsic Failure Rate (reliability engineering) |
| IFR➣Initiative for Fiduciary Responsibility |
| IFR➣Insurance and Financial Review (State Farm) |
| IFR➣Issued for Review |
| IFR➣Institute of Finance Research (Vietnam) |
| IFR➣Injury Frequency Ratio (OSHA) |
| IFR➣International Fantasy Regulation (Bulwer-Lytton Fiction Contest) |
| IFR➣Indirect Fractal Resolution |
| IFR➣Integrated Functional Representation |
| IFR➣Interference-Fading Resistance |
| IFR➣Item for Review |
| IFR➣Instant Failure Rate |