●ˈprey on sth ( ˈprey upon sthmore formal) if a bird or an animal preys on/upon another bird or animal, it hunts and kills it for food(鸟兽)捕食,猎食◆They prey on small mammals. 它们捕食小型哺乳动物。◆These small fish are preyed upon by sharks and other fish. 这些小鱼是鲨鱼和其他鱼类的猎物。[v + prep]