Source : Webster's Revised Unabridged Dictionary (1913)

Fiesta \Fies"ta\, n. [Sp. See {Feast}, n.]
   Among Spanish, a religious festival; a saint's day or
   holiday; also, a holiday or festivity.

         Even . . . a bullfight is a fiesta.      --Am. Dialect
                                                  Notes.

         Some fiesta, when all the surrounding population were
         expected to turn out in holiday dress for merriment.
                                                  --The Century.

Source : WordNet®

fiesta
     n : an elaborate party (often outdoors) [syn: {fete}, {feast}]