Source : Webster's Revised Unabridged Dictionary (1913)

Celebration \Cel`e*bra"tion\, n. [L. celebratio.]
   The act, process, or time of celebrating.

         His memory deserving a particular celebration.
                                                  --Clarendok.

         Celebration of Mass is equivalent to offering Mass
                                                  --Cath. Dict.

         To hasten the celebration of their marriage. --Sir P.
                                                  Sidney.

Source : WordNet®

celebration
     n 1: a joyful occasion for special festivities to mark some happy
          event [syn: {jubilation}]
     2: any joyous diversion [syn: {festivity}]
     3: the public performance of a sacrament or solemn ceremony
        with all appropriate ritual; "the celebration of marriage"
        [syn: {solemnization}, {solemnisation}]