The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, n. [OE. bugle buffalo, buffalo's horn, OF.
   bugle, fr. L. buculus a young bullock, steer, dim. of bos ox.
   See Cow the animal.]
   A sort of wild ox; a buffalo. --E. Phillips.
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The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, n. [See Bugle a wild ox.]
   1. A horn used by hunters.
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   2. (Mus.) A copper instrument of the horn quality of tone,
      shorter and more conical that the trumpet, sometimes
      keyed; formerly much used in military bands, very rarely
      in the orchestra; now superseded by the cornet; -- called
      also the Kent bugle.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, n. [LL. bugulus a woman's ornament: cf. G.
   b["u]gel a bent piece of metal or wood, fr. the same root as
   G. biegen to bend, E. bow to bend.]
   An elongated glass bead, of various colors, though commonly
   black.
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The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, a. [From Bugle a bead.]
   Jet black. "Bugle eyeballs." --Shak.
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The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, n. [F. bugle; cf. It. bugola, L. bugillo.]
   (Bot.)
   A plant of the genus Ajuga of the Mint family, a native of
   the Old World.
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   Yellow bugle, the Ajuga cham[ae]pitys.
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WordNet (r) 3.0 (2006):

bugle
    n 1: a brass instrument without valves; used for military calls
         and fanfares
    2: any of various low-growing annual or perennial evergreen
       herbs native to Eurasia; used for ground cover [syn: bugle,
       bugleweed]
    3: a tubular glass or plastic bead sewn onto clothing for
       decoration
    v 1: play on a bugle