The Collaborative International Dictionary of English v.0.48:

Determine \De*ter"mine\, v. t. [imp. & p. p. Determined; p.
   pr. & vb. n. Determining.] [F. d['e]terminer, L.
   determinare, determinatum; de + terminare limit, terminus
   limit. See Term.]
   1. To fix the boundaries of; to mark off and separate.
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            [God] hath determined the times before appointed.
                                                  --Acts xvii.
                                                  26.
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   2. To set bounds to; to fix the determination of; to limit;
      to bound; to bring to an end; to finish.
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            The knowledge of men hitherto hath been determined
            by the view or sight.                 --Bacon.
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            Now, where is he that will not stay so long
            Till his friend sickness hath determined me? --Shak.
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   3. To fix the form or character of; to shape; to prescribe
      imperatively; to regulate; to settle.
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            The character of the soul is determined by the
            character of its God.                 --J. Edwards.
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            Something divinely beautiful . . . that at some time
            or other might influence or even determine her
            course of life.                       --W. Black.
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   4. To fix the course of; to impel and direct; -- with a
      remoter object preceded by to; as, another's will
      determined me to this course.
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   5. To ascertain definitely; to find out the specific
      character or name of; to assign to its true place in a
      system; as, to determine an unknown or a newly discovered
      plant or its name.
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   6. To bring to a conclusion, as a question or controversy; to
      settle authoritative or judicial sentence; to decide; as,
      the court has determined the cause.
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   7. To resolve on; to have a fixed intention of; also, to
      cause to come to a conclusion or decision; to lead; as,
      this determined him to go immediately.
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   8. (Logic) To define or limit by adding a differentia.
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   9. (Physical Sciences) To ascertain the presence, quantity,
      or amount of; as, to determine the parallax; to determine
      the salt in sea water.
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The Collaborative International Dictionary of English v.0.48:

Determine \De*ter"mine\, v. i.
   1. To come to an end; to end; to terminate. [Obs.]
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            He who has vented a pernicious doctrine or published
            an ill book must know that his life determine not
            together.                             --South.
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            Estates may determine on future contingencies.
                                                  --Blackstone.
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   2. To come to a decision; to decide; to resolve; -- often
      with on. "Determine on some course." --Shak.
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            He shall pay as the judges determine. --Ex. xxi. 22.
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WordNet (r) 3.0 (2006):

determine
    v 1: establish after a calculation, investigation, experiment,
         survey, or study; "find the product of two numbers"; "The
         physicist who found the elusive particle won the Nobel
         Prize" [syn: determine, find, find out, ascertain]
    2: shape or influence; give direction to; "experience often
       determines ability"; "mold public opinion" [syn: determine,
       shape, mold, influence, regulate]
    3: fix conclusively or authoritatively; "set the rules" [syn:
       determine, set]
    4: decide upon or fix definitely; "fix the variables"; "specify
       the parameters" [syn: specify, set, determine,
       define, fix, limit]
    5: reach, make, or come to a decision about something; "We
       finally decided after lengthy deliberations" [syn: decide,
       make up one's mind, determine]
    6: fix in scope; fix the boundaries of; "the tree determines the
       border of the property"
    7: settle conclusively; come to terms; "We finally settled the
       argument" [syn: settle, square off, square up,
       determine]
    8: find out, learn, or determine with certainty, usually by
       making an inquiry or other effort; "I want to see whether she
       speaks French"; "See whether it works"; "find out if he
       speaks Russian"; "Check whether the train leaves on time"
       [syn: determine, check, find out, see, ascertain,
       watch, learn]

Moby Thesaurus II by Grady Ward, 1.0:

236 Moby Thesaurus words for "determine":
   abort, act on, actuate, adjudge, advance, affect, afford proof of,
   aim, aim at, arbitrate, ascertain, aspire after, aspire to, assign,
   assure, be after, be informed, become acquainted with, bend, bias,
   bound, bring, bring home to, broaden the mind, call the shots,
   carry, catch on, cease, certify, choose, choose to, cinch,
   circle in, circumscribe, clear up, clinch, close, command,
   complete, conclude, condition, conduce to, contribute to, control,
   cram the mind, decide, decide upon, decree, define, delimit,
   delimitate, demarcate, demonstrate, denominate, design, designate,
   desire, destine, detect, determine upon, dictate, direct,
   directionize, discover, dismiss all doubt, dispose, draw, drive,
   drive at, enclose, end, engage, enlist, ensure, establish, fate,
   figure, find, find out, find out about, finish, finish up, fix,
   fix on, fix upon, follow, follow from, foreordain, forward,
   gain knowledge, get, get at, get hold of, get to do, go for,
   govern, guide, halt, harbor a design, have a case,
   have every intention, hear, hit, hold good, hold on, hold water,
   hunt down, impel, incline, indicate, induce, infer, influence,
   insure, intend, interest in, invent, judge, lay off, lead, lead to,
   learn, learn about, level at, limit, load the mind, locate, lure,
   make a decision, make certain, make good, make no doubt,
   make no mistake, make out, make sure, make sure of, mark,
   mark boundaries, mark off, mark out, mark the periphery, mean,
   measure, mention, move, nail down, name, order, perorate, persuade,
   pick out, pick up information, pin down, plan, point, point at,
   point out, point to, predetermine, predispose, preordain, present,
   procure, project, prompt, propose, prove, prove to be, prove true,
   purport, purpose, reassure, rediscover, redound to, regulate,
   remove all doubt, resolve, rope off, rule, run down, run to earth,
   scrap, scratch, seal, see, see fit, see that, see to it, select,
   set, set at rest, set the limit, settle, settle on,
   settle the matter, settle upon, shape, show, sight on, signify,
   sort out, specialize, specify, stake out, state, stipulate, stop,
   strike, subserve, surround, sway, take a decision,
   take a resolution, tempt, terminate, think, think fit, think good,
   think proper, trace, trace down, track down, train, train upon,
   tumble, turn, turn the scale, turn upon, ultimate, unearth, verify,
   wear the pants, will, wind up, wish, wrap up