adv. On the bare back of a horse, without using a saddle; as, to ride bareback. [ 1913 Webster ]
a. Having the back uncovered; as, a barebacked horse. [ 1913 Webster ]
n. (Zool.) One of several species of pheasants of the genus Euplocamus, having the lower back a bright, fiery red. They inhabit Southern Asia and the East Indies. [ 1913 Webster ]