| Acronym | Definition |
|---|
| FK | Foreign Key |
| FK | Falkirk (postcode, United Kingdom) |
| FK | Free Kick (Soccer) |
| FK | First Kiss |
| FK | Flashkit |
| FK | French Kiss |
| FK | Fudbalski Klub (Serbian: Football Club) |
| FK | Forever Knight (show) |
| FK | Function Key |
| FK | For Kicks |
| FK | Futbolo Klubas (Lithuanian: Football Club) |
| FK | Freddy Krueger (movie villain) |
| FK | Finders Keepers |
| FK | ForumKorner |
| FK | Fremdkapital |
| FK | Fox Kids |
| FK | Fibrose Kystique (French: Cystic Fibrosis) |
| FK | Forward Kinematics |
| FK | Flower Kings (Swedish progressive-rock band) |
| FK | Foundation Kit (Apple, NextStep, OpenStep, Rhapsody) |
| FK | Fuji Kosan (Japan) |
| FK | Falkland Islands (Malvina) (country code, top level domain name) |
| FK | Field Kitchen |
| FK | Fänrik (Swedish equivalent of 2nd Lieutenant) |
| FK | Finder's Keepers (kids TV show) |
| FK | Frames Kernel |
| FK | Franz Keldysh Effect (absorption edge shift) |
| FK | Fresh Killed (reptile feeding) |
| FK | Free Kawfee (Pennsylvania alt-rock-funk band) |