Bay (�), a. [F. bai, fr. L. badius brown, chestnut-colored; — used only of horses.] Reddish brown; of the color of a chestnut; — applied to the color of horses.
Bay cat(Zoöl.), a wild cat of Africa and the East Indies (Felis aurata). — Bay lynx(Zoöl.), the common American lynx (Felis, or Lynx, rufa).