n. A sort of wild ox; a buffalo.n. A young bull.n. A hunting-horn. Also called bugle-horn.n. A military musical wind-instrument of brass, once or more curved, sometimes furnished with keys or valves, so as to be capable of producing all the notes of the scale.To sound a bugle.n. A shining elongated glass bead, usually black, used in decorating female apparel: as, “bugle-bracelet,”Having the color of a glass bugle; jet-black: as, “bugle eyeballs,”n. The popular English name for a common low labiate plant of Europe, Ajuga reptans.