The Collaborative International Dictionary of English v.0.48:

Advent \Ad`vent\, n. [L. adventus, fr. advenire, adventum: cf.
   F. avent. See Advene.]
   1. (Eccl.) The period including the four Sundays before
      Christmas.
      [1913 Webster]

   Advent Sunday (Eccl.), the first Sunday in the season of
      Advent, being always the nearest Sunday to the feast of
      St. Andrew (Now. 30). --Shipley.
      [1913 Webster]

   2. The first or the expected second coming of Christ.
      [1913 Webster]

   3. Coming; any important arrival; approach.
      [1913 Webster]

            Death's dreadful advent.              --Young.
      [1913 Webster]

            Expecting still his advent home.      --Tennyson.
      [1913 Webster]

Jargon File (4.4.4, 14 Aug 2003):

ADVENT
 /ad'vent/, n.

   The prototypical computer adventure game, first designed by Will
   Crowther on the PDP-10 in the mid-1970s as an attempt at
   computer-refereed fantasy gaming, and expanded into a puzzle-oriented
   game by Don Woods at Stanford in 1976. (Woods had been one of the
   authors of INTERCAL.) Now better known as Adventure or Colossal
Cave
   Adventure, but the TOPS-10 operating system permitted only
   six-letter filenames in uppercase. See also vadding, Zork, and
   Infocom.

   Figure 1. Screen shot of the original ADVENT game
Orange River Chamber
You are in a splendid chamber thirty feet high. The walls are frozen
rivers of
orange stone. An awkward canyon and a good passage exit from east and
west
sidesof the chamber.

A cheerful little bird is sitting here singing.

>drop rod
Dropped.

>take bird
You catch the bird in the wicker cage.

>take rod
Taken.

>w
At Top of Small Pit
At your feet is a small pit breathing traces of white mist. A west
passage ends
here except for a small crack leading on.

Rough stone steps lead down the pit.

>down

In Hall of Mists
You are at one end of a vast hall stretching forward out of sight to the
west.
There are openings to either side. Nearby, a wide stone staircase leads
downward. The hall is filled with wisps of white mist swaying to and fro
almost
as if alive. A cold wind blows up the staircase. There is a passage at
the top
of a dome behind you.

Rough stone steps lead up the dome.

   This game defined the terse, dryly humorous style since expected in
   text adventure games, and popularized several tag lines that have
   become fixtures of hacker-speak: "A huge green fierce snake bars the
   way!" "I see no X here" (for some noun X). "You are in a maze of
   twisty little passages, all alike." "You are in a little maze of
   twisty passages, all different." The `magic words' xyzzy and
plugh
   also derive from this game.

   Crowther, by the way, participated in the exploration of the Mammoth
&
   Flint Ridge cave system; it actually has a Colossal Cave and a
   Bedquilt as in the game, and the Y2 that also turns up is cavers'
   jargon for a map reference to a secondary entrance.

   ADVENT sources are available for FTP at
   ftp://ftp.wustl.edu/doc/misc/if-archive/games/source/advent.tar.Z.
You
   can also play it as a Java applet. There is a good page of resources
   at the Colossal Cave Adventure Page.


U.S. Gazetteer (1990):

Advent, WV
  Zip code(s): 25231

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "Advent":
   Allhallowmas, Allhallows, Allhallowtide, Annunciation,
   Annunciation Day, Ascension Day, Ash Wednesday, Candlemas,
   Candlemas Day, Carnival, Christmas, Corpus Christi, Easter,
   Easter Monday, Easter Saturday, Easter Sunday, Eastertide,
   Ember days, Epiphany, Good Friday, Halloween, Hallowmas,
   Holy Thursday, Holy Week, Lady Day, Lammas, Lammas Day, Lammastide,
   Lent, Lententide, Mardi Gras, Martinmas, Maundy Thursday,
   Michaelmas, Michaelmas Day, Michaelmastide, Palm Sunday,
   Pancake Day, Passion Week, Pentecost, Quadragesima,
   Quadragesima Sunday, Septuagesima, Shrove Tuesday, Trinity Sunday,
   Twelfth-day, Twelfth-tide, Whit-Tuesday, White Sunday, Whitmonday,
   Whitsun, Whitsunday, Whitsuntide, Whitweek



Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "advent":
   access, accession, accomplishment, achievement, advance, afflux,
   affluxion, appearance, approach, approach of time, approaching,
   appropinquation, approximation, appulse, arrival, attainment,
   coming, coming near, coming toward, flowing toward, forthcoming,
   imminence, nearing, nearness, oncoming, proximation, reaching,
   time drawing on