| Acronym | Definition |
|---|
| EFR➣Early Failure Rate (reliability) |
| EFR➣Emergency First Response/Responder |
| EFR➣Enhanced Full Rate |
| EFR➣External Fault Relay |
| EFR➣End Function Review |
| EFR➣Exchange for Risk (sales) |
| EFR➣Experimental Forests and Ranges (USDA) |
| EFR➣Explorations Fonctionnelles Respiratoires (French: Pulmonary Function Testing) |
| EFR➣Envelope Following Response |
| EFR➣École Française de Rome (French: French School of Rome; Rome, Italy) |
| EFR➣Emerging Flux Region |
| EFR➣Eastern Frontier Rifles (India) |
| EFR➣Environmental Flow Requirement |
| EFR➣Efficient Foodservice Response (initiative) |
| EFR➣Eosinophilic Fungal Rhinosinusitis |
| EFR➣École de Formation Routière (French: Road Training School) |
| EFR➣Employee & Family Resources |
| EFR➣Engineering Factual Report |
| EFR➣Early Ford Registry (1903-1909) |
| EFR➣Emergency Fire Response (gaming) |
| EFR➣European Fast Reactor (reprocessing of spent nuclear fuels) |
| EFR➣Entreprise de Filetage Roulé (French: Thread Wrap Company) |
| EFR➣Environmental Field Report (Canada) |
| EFR➣European Furnace Ropion (French furnace company) |
| EFR➣Emergency Food Ration |
| EFR➣Educational Foundations and Research (University of North Dakota) |
| EFR➣Eastside Fire Rescue (Washington) |
| EFR➣Ecole Familiale Rurale (French: Rural Family School) |
| EFR➣Exhaust Fuel Ratio |
| EFR➣Extended Focus Range (Leupold rifle scope) |
| EFR➣Expiratory Flow Rate (pulmonary function testing) |
| EFR➣Electronic Food Records (initiative) |
| EFR➣Effective Resolution |
| EFR➣Extended Flight Rules |
| EFR➣Extended Frequency Range |
| EFR➣Equity Fund Raising |
| EFR➣European Financial Roundtable |
| EFR➣Eagle First Responder |
| EFR➣Equipment Facility Requirement |
| EFR➣Elite Fighting Revolution (Northern Ireland, UK) |
| EFR➣Equipment Failure Report |
| EFR➣Engine Firing Rate |
| EFR➣Electronic Failure Report |
| EFR➣External Function Request |
| EFR➣Expect Further Routing |
| EFR➣Engineering Facility Requirement |
| EFR➣Expatriate Failure Rate |
| EFR➣Environment Flow Releases |
| EFR➣Extracorporeal Flow Rate |