The Collaborative International Dictionary of English v.0.48:

Phenix \Phe"nix\, n.; pl. Phenixes. [L. phoenix, Gr. foi^nix.]
   [Written also ph[oe]nix.]
   1. (Gr. Myth.) A bird fabled to exist single, to be consumed
      by fire by its own act, and to rise again from its ashes.
      Hence, an emblem of immortality.
      [1913 Webster]

   2. (Astron.) A southern constellation.
      [1913 Webster]

   3. A marvelous person or thing. [R.] --Latimer.
      [1913 Webster]

   4. A person or thing that suffered destruction or defeat and
      was restored to its former state.
      [PJC]

   to rise like a phoenix, to resume an endeavor after an
      apparently final defeat.
      [PJC]