BAV or Bav may refer to:Balloon aortic valvuloplasty, a medical procedure Bamboo Airways, a Vietnamese airline Banna virus, Reoviridae family Baotou Erliban Airport, China Battle Athletes Victory, a Japanese anime based on Battle Athletes Bavaria, a state of Germany Bicuspid aortic valve, a congenital condition of the aortic valve Bovine adenovirus, abbreviated BAdV Federal Office for Transport, a government agency of Austria Federal Office for Transport (Switzerland), a government agency of Switzerland Vatican Library, the library of the Holy See, located in Vatican City