The Collaborative International Dictionary of English v.0.48:

Final \Fi"nal\ (f[imac]"nal), a. [F., fr. L. finalis, fr. finis
   boundary, limit, end. See Finish.]
   1. Pertaining to the end or conclusion; last; terminating;
      ultimate; as, the final day of a school term.
      [1913 Webster]

            Yet despair not of his final pardon.  --Milton.
      [1913 Webster]

   2. Conclusive; decisive; as, a final judgment; the battle of
      Waterloo brought the contest to a final issue.
      [1913 Webster]

   3. Respecting an end or object to be gained; respecting the
      purpose or ultimate end in view.
      [1913 Webster]

   Final cause. See under Cause.

   Syn: Final, Conclusive, Ultimate.

   Usage: Final is now appropriated to that which brings with it
          an end; as, a final adjustment; the final judgment,
          etc. Conclusive implies the closing of all discussion,
          negotiation, etc.; as, a conclusive argument or fact;
          a conclusive arrangement. In using ultimate, we have
          always reference to something earlier or proceeding;
          as when we say, a temporary reverse may lead to an
          ultimate triumph. The statements which a man finally
          makes at the close of a negotiation are usually
          conclusive as to his ultimate intentions and designs.
          [1913 Webster]

WordNet (r) 3.0 (2006):

final
    adj 1: occurring at or forming an end or termination; "his
           concluding words came as a surprise"; "the final
           chapter"; "the last days of the dinosaurs"; "terminal
           leave" [syn: concluding, final, last, terminal]
    2: conclusive in a process or progression; "the final answer";
       "a last resort"; "the net result" [syn: final, last,
       net]
    3: not to be altered or undone; "the judge's decision is final";
       "the arbiter will have the last say" [syn: final, last]
    n 1: the final match between the winners of all previous matches
         in an elimination tournament
    2: an examination administered at the end of an academic term
       [syn: final examination, final exam, final]

Moby Thesaurus II by Grady Ward, 1.0:

189 Moby Thesaurus words for "final":
   absolute, adducible, admissible, admitting no exception, all-out,
   attestative, attestive, audition, authentic, based on, binding,
   blue book, boundary, categorical, caudal, certain, circumstantial,
   clear, closing, collateral, coming, complete, completing,
   completive, completory, compulsory, concluding, conclusive,
   consequent, consequential, consummative, contingent, convincing,
   crowning, culminating, cumulative, damning, decided, decisive,
   decretory, definite, definitive, departing, derivational,
   derivative, determinate, determinative, dictated, documentary,
   documented, downright, end, ending, endmost, ensuing, entailed,
   entire, eventual, evidential, evidentiary, ex parte, exam, examen,
   examination, explicit, express, extreme, eye-witness, factual,
   farewell, farthest, final examination, finalizing, finishing,
   firsthand, fixed, flat, flat-out, following, founded on,
   fulfilling, global, great go, grounded on, hard-and-fast, hearing,
   hearsay, hindmost, honors, immutable, imperative, implicit,
   imposed, inappealable, incontrovertible, indicative, indirect,
   indisputable, irrefutable, irresistible, irreversible, irrevocable,
   lag, last, latest, latter, leaving, limiting, mandated, mandatory,
   material, midsemester, midterm, must, nuncupative, obligatory,
   oral, oral examination, out-and-out, outright, outward-bound,
   overwhelming, parting, peremptory, perfect, polar, positive,
   prelim, prescript, prescriptive, presumptive, probative, quiz,
   reliable, required, resultant, resulting, round, secondary,
   sequacious, sequent, sequential, settled, significant, straight,
   straight-out, suggestive, sure, symptomatic, tail,
   take-home examination, telling, terminal, terminating, terminative,
   test, total, trial, tripos, ultimate, unalterable, unanswerable,
   unchangeable, uncircumscribed, unconditional, unconditioned,
   undoubting, unequivocal, unhampered, unhesitating, unlimited,
   unmistakable, unmitigated, unqualified, unquestioning, unreserved,
   unrestricted, unwaivable, utter, valedictory, valid, viva, weighty,
   whole, without appeal, without exception, without reserve, written,
   written examination



Bouvier's Law Dictionary, Revised 6th Ed (1856):

FINAL. That which puts an end to anything.
     2. It is used in opposition to interlocutory; as, a final judgment,. is
a judgment which ends the controversy between the parties litigant. 1 Wheat.
355; 2 Pet. 449. See 12 Wheat. 135; 4 Dall. 22; 9 Pet. 1; 6 Wheat. 448; 3
Cranch, 179; 6 Cranch, 51; Bouv. Inst. Index, h.t.