[1] : The Collaborative International Dictionary of English v.0.48

christmas \christ"mas\, n. christ + mass.
   an annual church festival december 25 and in some states a
   legal holiday, in memory of the birth of christ, often
   celebrated by a particular church service, and also by
   special gifts, greetings, and hospitality.
   1913 webster

   christmas box.
   a a box in which presents are deposited at christmas.
   b a present or small gratuity given to young people and
       servants at christmas; a christmas gift.

   christmas carol, a carol sung at, or suitable for,
      christmas.

   christmas day. same as christmas.

   christmas eve, the evening before christmas.

   christmas fern bot., an evergreen north american fern
      aspidium acrostichoides, which is much used for
      decoration in winter.

   christmas flower, christmas rose, the black hellebore, a
      poisonous plant of the buttercup family, which in southern
      europe often produces beautiful roselike flowers
      midwinter.

   christmas tree, a small evergreen tree, set up indoors, to
      be decorated with bonbons, presents, etc., and illuminated
      on christmas eve.
      1913 webster
see also:
christmas box christmas carol christmas day christmas christmas eve christmas fern 
aspidium acrostichoides christmas flower christmas rose christmas tree 

[2] : WordNet (r) 2.0

christmas
     n 1: period extending from dec. 24 to jan. 6 syn: christmastide,
           christmastime, yule, yuletide, noel
     2: a christian holiday celebrating the birth of christ; a
        quarter day in england, wales, and ireland syn: christmas
        day, xmas, dec 25
     v : spend christmas; "we were christmassing in new york"
see also:
christmastide christmastime yule yuletide noel christmas day 
xmas dec 25 

[3] : Moby Thesaurus II by Grady Ward, 1.0

58 moby thesaurus words for "christmas":
   advent, allhallowmas, allhallows, allhallowtide, annunciation,
   annunciation day, ascension day, ash wednesday, candlemas,
   candlemas day, carnival, 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, nativity, 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, noel, yule, yuletide

[4] : U.S. Gazetteer (1990)

christmas, fl
  zip codes: 32709
christmas, mi
  zip codes: 49862

[5] : U.S. Gazetteer Places (2000)

christmas, fl -- u.s. census designated place in florida
   population 2000:    1162
   housing units 2000: 446
   land area 2000:     3.572145 sq. miles 9.251812 sq. km
   water area 2000:    0.000000 sq. miles 0.000000 sq. km
   total area 2000:    3.572145 sq. miles 9.251812 sq. km
   fips code:            12250
   located within:       florida fl, fips 12
   location:             28.532428 n, 80.993956 w
   zip codes 1990:     32709
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    christmas, fl
    christmas

Christmas >> C Words
Christmas, definition of term: Christmas
christmas_pag1.html

Christmas Flowe >> C Words
Christmas Flowe, definition of term: Christmas Flowe
christmas+flowe_pag1.html

Christmas Tree >> C Words
Christmas Tree, definition of term: Christmas Tree
christmas+tree_pag1.html

Christmas Eve >> C Words
Christmas Eve, definition of term: Christmas Eve
christmas+eve_pag1.html

Christmas Carol >> C Words
Christmas Carol, definition of term: Christmas Carol
christmas+carol_pag1.html

Christmas Cactu >> C Words
Christmas Cactu, definition of term: Christmas Cactu
christmas+cactu_pag1.html

Christmas Card >> C Words
Christmas Card, definition of term: Christmas Card
christmas+card_pag1.html

Christmas Day >> C Words
Christmas Day, definition of term: Christmas Day
christmas+day_pag1.html