brush-turkey noun1 •Any of several species of large birds, found in Australia and New Guinea, in the megapode (turkey-like) family Megapodiidae.We may also, I think, see in the peculiar organization of the entire family of the Megapodidae or Brush Turkeys, a reason why they depart so widely from the usual habits of the Class of birds. — 1869 formsbrush turkeys · brush-turkeys