OTB may mean: Off-track betting, sanctioned gambling on horse racing outside a race track Overberg Test Range, or Overberg Toetsbaan, a missile test range in South Africa Over-the-board chess, played between opponents seated at the same chessboard (as opposed to correspondence chess) Overseas Trust Bank, a defunct bank of Hong Kong On the Boards, a Seattle, Washington arts organization. "On the beach", a song by York Off the ball, a players movement when not in possession of the ball in so… (More on Otb)