Source : Webster's Revised Unabridged Dictionary (1913)

Argus \Ar"gus\, n. [L. Argus, Gr. ?.]
   1. (Myth.) A fabulous being of antiquity, said to have had a
      hundred eyes, who has placed by Juno to guard Io. His eyes
      were transplanted to the peacock's tail.

   2. One very vigilant; a guardian always watchful.

   3. (Zo["o]l.) A genus of East Indian pheasants. The common
      species ({A. giganteus}) is remarkable for the great
      length and beauty of the wing and tail feathers of the
      male. The species {A. Grayi} inhabits Borneo.