BKL may mean: * Cleveland Burke Lakefront Airport, Ohio, United States * Big Kernel Lock, a Linux kernel mechanism * Berik, by ISO 639-3 language code - see ISO 639:b * BKL singularity, or Belinsky–Khalatnikov–Lifshitz singularity, a Universe evolution model * Bickley railway station, by station code * Bolshaya Koltsevaya line, a line of Moscow Metro * British Kabaddi League, a sports league

See also