The Collaborative International Dictionary of English v.0.48:

Finality \Fi*nal"i*ty\, n.; pl. Finalities. [L. finalitas the
   being last.]
   1. The state of being final, finished, or complete; a final
      or conclusive arrangement; a settlement. --Baxter.
      [1913 Webster]

   2. The relation of end or purpose to its means. --Janet.
      [1913 Webster]

WordNet (r) 3.0 (2006):

finality
    n 1: the quality of being final or definitely settled; "the
         finality of death" [syn: finality, conclusiveness,
         decisiveness] [ant: inconclusiveness]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "finality":
   Z, apodosis, catastrophe, ceasing, certainty, certitude, cessation,
   coda, conclusion, consummation, crack of doom, culmination,
   curtain, curtains, death, decease, decisiveness, definitiveness,
   denouement, destination, destiny, doom, effect, end, end point,
   ending, envoi, epilogue, eschatology, eventuality, expiration,
   fate, final solution, final twitch, final words, finale, finis,
   finish, fixedness, futureness, futurity, goal, immutability,
   incontrovertibility, indisputability, irrefutability,
   irreversibility, izzard, last, last breath, last gasp, last things,
   last trumpet, last words, latter end, omega, payoff, period,
   peroration, quietus, resolution, resting place, stoppage,
   stopping place, sureness, swan song, term, terminal, termination,
   terminus, ultimateness, unalterability, unchangeability, windup