| Acronym | Definition |
|---|
| ELF | Extremely Low Frequency (3-30 Hz; 100,000-10,000 km) |
| ELF | Earth Liberation Front |
| ELF | Executable and Linking Format (computer data format) |
| ELF | Electronic Filing |
| ELF | European Lung Foundation (Sheffield, UK) |
| ELF | Eritrean Liberation Front (Eritrea) |
| ELF | Epithelial Lining Fluid (medical) |
| ELF | Environmental Law Foundation |
| ELF | Enzyme-Labeled Fluorescence |
| ELF | Economic Limit Factor (tax rate adjustment for oil and gas field production) |
| ELF | Endangered Language Fund (Yale University) |
| ELF | Electric Light Fixtures (real estate) |
| ELF | Early Life Failure |
| ELF | Erisian Liberation Front |
| ELF | Elf Lore Family (south-central Indiana) |
| ELF | Extension Language Facility |
| ELF | Effective Learning Framework |
| ELF | Enterprise Learning Framework (Microsoft Vista) |
| ELF | Electromagnetic Flux (Earthsiege terminology game) |
| eLF | e-Learning Forum |
| ELF | Electronic Location Finder |
| ELF | Educational Leadership Foundation |
| ELF | Extended Layer File (WinImages image processing software) |
| ELF | Electrostatic Levitation Furnace |
| ELF | Evolutionary Learning of Fuzzy Rules (system) |
| ELF | Electroforce |
| ELF | Extraterrestrial Life Form |
| ELF | Eliminate Landmines Forever (ChemTech) |
| ELF | External Financing Limit (UK) |
| ELF | Eesti Looduse Fond (Estonian Fund for Nature) |
| ELF | Explicit Link Failure |
| ELF | El Fasher, Sudan - El Fasher (Airport Code) |
| ELF | Explosive-Actuated Light Filter |
| ELF | Employee Learning Fund (Canada) |
| ELF | Eye-safe Laser Filter |
| ELF | Energie Liquide de France (corporate name) |
| ELF | Energy Level Finder |
| ELF | Engineered Land Form |
| ELF | Engineered Landform |
| ELF | Evans Park, Lincoln Avenue, and Franklin Avenue |