| Acronym | Definition |
|---|
| SLF | Super Low Frequency (30-300 Hz; 10,000-1,000 km) |
| SLF | Senior Living Facility |
| SLF | Self |
| SLF | Saalfeld (German city auto license plate) |
| SLF | Sun Life Financial (various organizations) |
| SLF | Statens Landbruksforvaltning (Norwegian Agricultural Authority) |
| SLF | Superior Longitudinal Fasciculus (neurons) |
| SLF | Sveriges Läkarförbund |
| SLF | Samuel Lawrence Furniture (est. 1973; High Point, NC) |
| SLF | Securities Lending and Financing |
| SLF | Slip Line Field |
| SLF | Shuttle Landing Facility |
| SLF | Scottish Learning Festival (UK) |
| SLF | Stiff Little Fingers (punk rock band) |
| SLF | Subsystem Logging Facility |
| SLF | Swiss Federal Institute for Snow and Avalanche Research (also seen as SFISAR) |
| SLF | Straight Level Flight (aviation) |
| SLF | Sustainable Living Foundation (Melbourne, Australia) |
| SLF | Senior Living Foundation (American Foreign Service) |
| SLF | Sounds Like Fun |
| SLF | Southeastern Legal Foundation |
| SLF | Sanitary Landfill |
| SLF | Special Landing Force |
| SLF | Special Liquidity Facility (finance) |
| SLF | Single Latin Female |
| SLF | Slum Level Federation (India) |
| SLF | Student Leadership Forum (various locations) |
| SLF | Sustainable Livelihoods Framework |
| SLF | Singapore Labour Foundation |
| SLF | Seattle Liberation Front |
| SLF | Subscription Locator Function |
| SLF | Special Lady Friend |
| SLF | Standard Linear Format |
| SLF | Sidama Liberation Front |
| SLF | Self Loading Freight (aircrew slang for passengers) |
| SLF | Seat Load Factor |
| SLF | Seamless Flow (sinks) |
| SLF | Satterfield Law Firm, PLC (Arkansas) |
| SLF | Shredded Light Fraction |
| SLF | Synthetic Living Fibre (fly fishing) |
| SLF | Sewa Lanka Foundation |
| SLF | Senior Level Forum |
| SLF | Simulated League Football (Australia) |
| SLF | Sleigh Landing Facility (during the holidays; NASA) |
| SLF | Straight-Line Frequency |
| SLF | Symbol List File |
| SLF | Scalability Logger Format |
| SLF | Sign Language Festival |
| SLF | Safety Level Requirement |
| SLF | Sveriges Lantmätarförening |
| SLF | Sexual Liberation Front |
| SLF | Satan Loves Fusion (jazz metal band) |
| SLF | Spouse-Like Friend |
| SLF | Special Lending Facility (US government) |
| SLF | Saturday LAN (Local Area Network) Fever (gaming clan) |