| Acronym | Definition |
|---|
| ELF | Extremely Low Frequency (3-30 Hz; 100,000-10,000 km) |
| ELF | European Lung Foundation (Sheffield, UK) |
| ELF | Earth Liberation Front |
| ELF | Early Learning Fun (education; various locations) |
| ELF | Essential Living Foods (Culver City, CA) |
| ELF | Eyes Lips Face (cosmetics company) |
| ELF | Enhanced Liver Fibrosis (test) |
| ELF | Essential Legal Framework (workshop; various locations) |
| ELF | Ever Lasting Friends (Super Junior fan club) |
| ELF | Executable and Linking Format (computer data format) |
| ELF | Executive Leadership Foundation (various organizations) |
| ELF | Extended Layer File |
| ELF | Extremely Large Fabric |
| ELF | External Line Format |
| ELF | Extended Language Facility |
| ELF | Executable and Linking Format |
| ELF | Extensible Linking Format |
| ELF | Extended Log Format |
| ELF | Extremely Low Frequency |
| ELF | Electronic Application Form File |
| ELF | Elvish Linguistic Fellowship (J.R.R. Tolkien) |
| ELF | Electronic Filing |
| ELF | Eritrean Liberation Front (Eritrea) |
| ELF | English Language Fellow (various locations) |
| ELF | Environmental Law Foundation |
| ELF | Epithelial Lining Fluid (medical) |
| ELF | Electric Light Fixtures (real estate) |
| ELF | Extremely Low Flow |
| ELF | Emeril Lagasse Foundation |
| ELF | Environmental Liberation Front (est. 1992) |
| ELF | Exchange of Large Files (computing) |
| ELF | Enzyme-Labeled Fluorescence |
| ELF | Early Life Failure |
| ELF | Endangered Language Fund (Yale University) |
| ELF | Europe Lost and Found |
| ELF | Early Learning Foundation |
| ELF | Emergency Loan Fund (various organizations) |
| ELF | Economic Limit Factor (tax rate adjustment for oil and gas field production) |
| ELF | Elf Lore Family (south-central Indiana) |
| ELF | Electronic Low Frequency |
| ELF | Electromagnetic Flux (Earthsiege terminology game) |
| ELF | Erisian Liberation Front |
| ELF | Education and Legal Fund (Ohio) |
| ELF | Engagement Level Feedback |
| ELF | Education Loan Funding Corp. (Denver, CO) |
| ELF | e-Learning Forum |
| ELF | Electroforce |
| ELF | Environmental Learning Facility (various locations) |
| ELF | Effective Learning Framework |
| ELF | Electronic Labor Force (software) |
| ELF | Enterprise Learning Framework (Microsoft Vista) |
| ELF | Extraterrestrial Life Form |
| ELF | Environmental Life Force (activist group) |
| ELF | Enterprise Loan Fund (various organizations) |
| ELF | Evans Park, Lincoln Avenue, and Franklin Avenue |
| ELF | Extension Language Facility |
| ELF | Electronic Location Finder |
| ELF | Educational Leadership Foundation |
| ELF | Extended Layer File (WinImages image processing software) |
| ELF | Emergent Learning Forum |
| ELF | Electrostatic Levitation Furnace |
| ELF | Evolutionary Learning of Fuzzy Rules (system) |
| 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 | Eye-safe Laser Filter |
| ELF | Employee Learning Fund (Canada) |
| ELF | Explosive-Actuated Light Filter |
| ELF | Energie Liquide de France (corporate name) |
| ELF | Energy Level Finder |
| ELF | Engineered Landform |
| ELF | Engineered Land Form |
| ELF | Extensible and Linking Format |