STF may refer to: Concepts Spread tow fabric (stf), a type of lightweight fabric Smooth Trans Focus (STF), technology in photographic lenses that produces a smooth focus effect STF function, an autobracketing function on certain cameras that emulates a Smooth Trans Focus effect Short-time fasting (STF), medical term Organisations She's the First, an organization that fights gender inequality Songahm Taekwondo Federation, the South American branch of the American Taekwondo Association Supreme Federal Court (Portuguese: ), Brazil's supreme court Svenska Turistföreningen, the Swedish Tourist Association Special task forces Special Task Force (SAPS), a South African Counter-Terrorist force Special Task Force (Sri Lanka), Sri Lankan Police Counter-Terrorist force Special Task Force (India), an Indian Counter-Terrorist force Other uses George M. Bryan Airport (FAA location identifier: STF) of Starkville, Mississippi Shear thickening fluid, a type of smart material whose viscosity increases as shear stress increases Stepover Toehold Facelock, a submission hold used in professional wrestling Common Occupational Injuries often result from accidents known as Slips, Trips and Falls