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

commemorate \commem"orate\, v. t. imp.  p. p.
   commemorated; p. pr.  vb. n. commemorating. l.
   commemoratus, p. p. of commemorare to remember; com- +
   memorare to mention, fr. memor mindful. see memory.
   to call to remembrance by a special act or observance; to
   celebrate with honor and solemnity; to honor, as a person or
   event, by some act of respect or affection, intended to
   preserve the remembrance of the person or event; as, to
   commemorate the sufferings and dying love of our savior by
   the sacrament of the lord's supper; to commemorate the
   declaration of independence by the observance of the fourth
   of july.
   1913 webster

         we are called upon to commemorate a revolution.
                                                  --atterbury.

   syn: see celebrate.
        1913 webster
see also:
commemorated commemorating memory celebrate 

[2] : WordNet (r) 2.0

commemorate
     v 1: mark by some ceremony or observation; "we marked the
          anniversary of his death" syn: mark
     2: call to remembrance; keep alive the memory of someone or
        something, as in a ceremony; "we remembered the 50th
        anniversary of the liberation of auschwitz"; "remember the
        dead of the first world war" syn: remember
     3: be or provide a memorial to a person or an event; "this
        sculpture commemorates the victims of the concentration
        camps"; "we memorialized the dead" syn: memorialize, memorialise,
         immortalize, immortalise, record
see also:
mark remember memorialize memorialise immortalize immortalise 
record 

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

31 moby thesaurus words for "commemorate":
   beat the drum, blow the trumpet, celebrate, consecrate, dedicate,
   dress ship, fire a salute, hallow, hold jubilee, honor,
   immortalize, jubilate, jubilize, keep, maffick, make merry, mark,
   memorialize, monument, monumentalize, observe, remember, revere,
   reverence, salute, sanctify, signalize, solemnize, solemnly mark,
   sound a fanfare, venerate

Commemorate >> C Words
Commemorate, definition of term: Commemorate
commemorate_pag1.html