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]

The Collaborative International Dictionary of English v.0.48:

Phoenix \Ph[oe]"nix\ (f[=e]"n[i^]ks), n. [L., a fabulous bird.
   See Phenix.]
   1. Same as Phenix. --Shak.
      [1913 Webster]

   2. (Bot.) [Capitalized] A genus of palms including the date
      tree.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Phoenix
    n 1: the state capital and largest city located in south central
         Arizona; situated in a former desert that has become a
         prosperous agricultural area thanks to irrigation [syn:
         Phoenix, capital of Arizona]
    2: a large monocotyledonous genus of pinnate-leaved palms found
       in Asia and Africa [syn: phoenix, genus Phoenix]
    3: a legendary Arabian bird said to periodically burn itself to
       death and emerge from the ashes as a new phoenix; according
       to most versions only one phoenix lived at a time and it
       renewed itself every 500 years
    4: a constellation in the southern hemisphere near Tucana and
       Sculptor

The Free On-line Dictionary of Computing (19 January 2023):

Phoenix

    An operating system, built in BCPL on
   top of IBM MVT and later MVS by Cambridge University
   Computing Service from 1973 to 1995, which ran on the
   university central mainframe.  All parts of the system were
   named after birds, including Eagle (the job scheduler, also
   the nearest pub), Pigeon (the mailer), GCAL (the text
   processor) and Wren (the command language), leading to Wren
   Libraries (a local pun).

   Phoenix was much used by chemists in daytime and by the rest
   of the university in the evenings, and was only abandoned in
   favour of Unix in 1995; it is one reason Cambridge
   made little contribution to Unix until then.

   Computing Service Phoenix closure memo
   (http://cam.ac.uk/cs/newsletter/1995/nl183/phoenix.html)

   (2003-12-05)


The Devil's Dictionary (1881-1906):

PHOENIX, n.  The classical prototype of the modern "small hot bird."