The Collaborative International Dictionary of English v.0.48:

Finale \Fi*na"le\ (f[-e]*n[aum]"l[asl]), n. [It. See Final.]
   Close; termination; as:
   (a) (Mus.) The last movement of a symphony, sonata, concerto,
       or any instrumental composition.
   (b) The last composition performed in any act of an opera.
   (c) The closing part, piece, or scene in any public
       performance or exhibition.
       [1913 Webster]

WordNet (r) 3.0 (2006):

finale
    n 1: the closing section of a musical composition [syn:
         finale, coda]
    2: the temporal end; the concluding time; "the stopping point of
       each round was signaled by a bell"; "the market was up at the
       finish"; "they were playing better at the close of the
       season" [syn: stopping point, finale, finis, finish,
       last, conclusion, close]
    3: the concluding part of any performance [syn: finale,
       close, closing curtain, finis]

Moby Thesaurus II by Grady Ward, 1.0:

91 Moby Thesaurus words for "finale":
   Z, act, afterpiece, apodosis, bit, bitter end, catastrophe,
   ceasing, cessation, chaser, climax, close, coda, completion,
   conclusion, consummation, crack of doom, culmination, curtain,
   curtain call, curtain raiser, curtains, death, decease, denouement,
   destination, destiny, divertimento, divertissement, doom, effect,
   end, end point, end result, ending, envoi, epilogue, eschatology,
   exode, exodus, expiration, expository scene, fate, final result,
   final solution, final twitch, final words, finality, finis, finish,
   goal, hoke act, interlude, intermezzo, intermission, introduction,
   izzard, last, last act, last breath, last gasp, last things,
   last trumpet, last words, latter end, number, omega, payoff,
   period, peroration, prologue, quietus, resolution, resting place,
   routine, scene, shtick, sketch, skit, song and dance,
   stand-up comedy act, stoppage, stopping place, striptease,
   swan song, term, terminal, termination, terminus, turn, windup