The Collaborative International Dictionary of English v.0.48:

Doom \Doom\ (d[=oo]m), n. [As. d[=o]m; akin to OS. d[=o]m, OHG.
   tuom, Dan. & Sw. dom, Icel. d[=o]mr, Goth. d[=o]ms, Gr.
   qe`mis law; fr. the root of E. do, v. t. [root]65. See Do,
   v. t., and cf. Deem, -dom.]
   1. Judgment; judicial sentence; penal decree; condemnation.
      [1913 Webster]

            The first dooms of London provide especially the
            recovery of cattle belonging to the citizens. --J.
                                                  R. Green.
      [1913 Webster]

            Now against himself he sounds this doom. --Shak.
      [1913 Webster]

   2. That to which one is doomed or sentenced; destiny or fate,
      esp. unhappy destiny; penalty.
      [1913 Webster]

            Ere Hector meets his doom.            --Pope.
      [1913 Webster]

            And homely household task shall be her doom.
                                                  --Dryden.
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   3. Ruin; death.
      [1913 Webster]

            This is the day of doom for Bassianus. --Shak.
      [1913 Webster]

   4. Discriminating opinion or judgment; discrimination;
      discernment; decision. [Obs.]
      [1913 Webster]

            And there he learned of things and haps to come,
            To give foreknowledge true, and certain doom.
                                                  --Fairfax.

   Syn: Sentence; condemnation; decree; fate; destiny; lot;
        ruin; destruction.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Doom \Doom\, v. t. [imp. & p. p. Doomed; p. pr. & vb. n.
   Dooming.]
   1. To judge; to estimate or determine as a judge. [Obs.]
      --Milton.
      [1913 Webster]

   2. To pronounce sentence or judgment on; to condemn; to
      consign by a decree or sentence; to sentence; as, a
      criminal doomed to chains or death.
      [1913 Webster]

            Absolves the just, and dooms the guilty souls.
                                                  --Dryden.
      [1913 Webster]

   3. To ordain as penalty; hence, to mulct or fine.
      [1913 Webster]

            Have I tongue to doom my brother's death? --Shak.
      [1913 Webster]

   4. To assess a tax upon, by estimate or at discretion. [New
      England] --J. Pickering.
      [1913 Webster]

   5. To destine; to fix irrevocably the destiny or fate of; to
      appoint, as by decree or by fate.
      [1913 Webster]

            A man of genius . . . doomed to struggle with
            difficulties.                         --Macaulay.
      [1913 Webster]

WordNet (r) 3.0 (2006):

doom
    n 1: an unpleasant or disastrous destiny; "everyone was aware of
         the approaching doom but was helpless to avoid it"; "that's
         unfortunate but it isn't the end of the world" [syn:
         doom, doomsday, day of reckoning, end of the world]
    v 1: decree or designate beforehand; "She was destined to become
         a great pianist" [syn: destine, fate, doom,
         designate]
    2: pronounce a sentence on (somebody) in a court of law; "He was
       condemned to ten years in prison" [syn: sentence,
       condemn, doom]
    3: make certain of the failure or destruction of; "This decision
       will doom me to lose my position"

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

DOOM

    A simulated 3D moster-hunting action game for IBM
   PCs, created and published by id Software.  The original
   press release was dated January 1993.  A cut-down shareware
   version v1.0 was released on 10 December 1993 and again with
   some bug-fixes, as v1.4 in June 1994.

   DOOM is similar to Wolfenstein 3d (id Software, Apogee) but
   has better texture mapping; walls can be at any angle, of
   any thickness and have windows; lighting can fade into the
   distance or come from point sources; floors and ceilings can
   be of any height; many surfaces are animated; up to four
   players can play over a network or two by serial link; it has
   a high frame rate (comparable to TV on a 486/33); DOOM
   isn't just a collection of connected closed rooms like
   Wolfenstein but sounds can travel anywhere and alert monsters
   of your approach.

   The shareware version is available from these sites:
   Cactus (ftp://cactus.org/pub/IHHD/multi-player/),
   Manitoba (ftp://ftp.cc.umanitoba.ca/pub/doom/),
   UK (ftp://ftp.demon.co.uk/pub/ibmpc/games/id/),
   South Africa (ftp://ftp.sun.ac.za/pub/msdos/games/id/),
   UWP ftp (ftp://archive.uwp.edu/pub/msdos/games/id/),
   UWP http (http://archive.uwp.edu/pub/msdos/games/id/),
   Finland (ftp://ftp.funet.fi/pub/msdos/games/id),
   Washington
(ftp://wuarchive.wustl.edu/pub/MSDOS_UPLOADS/games/doom).

   A FAQ by Hank Leukart: UWP
   (ftp://ftp.uwp.edu/pub/msdos/games/id/home-brew/doom),
   Washington
   (ftp://wuarchive.wustl.edu/pub/MSDOS_UPLOADS/games/doomstuff).
   FAQ on WWW (http://venom.st.hmc.edu/~tkelly/doomfaq/intro.html).
   Other links (http://gamesdomain.co.uk/descript/doom.html).

   Usenet newsgroups: news:rec.games.computer.doom.announce,
   news:rec.games.computer.doom.editing,
   news:rec.games.computer.doom.help,
   news:rec.games.computer.doom.misc,
   news:rec.games.computer.doom.playing, news:alt.games.doom,
   news:comp.sys.ibm.pc.games.action,
   news:comp.sys.ibm.pc.games.announce,
   news:comp.sys.ibm.pc.games.misc.

   Mailing List:  ("sub DOOML" in
   the message body, no subject).

   Telephone: +44 (1222) 362 361 - the UK's first multi-player
   DOOM and games server.

   (1994-12-14)