The Collaborative International Dictionary of English v.0.48:

Satisfy \Sat"is*fy\, v. t. [imp. & p. p. Satisfied; p. pr. &
   vb. n. Satisfying.] [OF. satisfier; L. satis enough +
   -ficare (in comp.) to make; cf. F. satisfaire, L.
   satisfacere. See Sad, a., and Fact.]
   1. In general, to fill up the measure of a want of (a person
      or a thing); hence, to grafity fully the desire of; to
      make content; to supply to the full, or so far as to give
      contentment with what is wished for.
      [1913 Webster]

            Death shall . . . with us two
            Be forced to satisfy his ravenous maw. --Milton.
      [1913 Webster]

   2. To pay to the extent of claims or deserts; to give what is
      due to; as, to satisfy a creditor.
      [1913 Webster]

   3. To answer or discharge, as a claim, debt, legal demand, or
      the like; to give compensation for; to pay off; to
      requite; as, to satisfy a claim or an execution.
      [1913 Webster]

   4. To free from doubt, suspense, or uncertainty; to give
      assurance to; to set at rest the mind of; to convince; as,
      to satisfy one's self by inquiry.
      [1913 Webster]

            The standing evidences of the truth of the gospel
            are in themselves most firm, solid, and satisfying.
                                                  --Atterbury.
      [1913 Webster]

   Syn: To satiate; sate; content; grafity; compensate. See
        Satiate.
        [1913 Webster]

WordNet (r) 3.0 (2006):

satisfied
    adj 1: filled with satisfaction; "a satisfied customer"
    2: allayed; "his thirst quenched he was able to continue" [syn:
       quenched, satisfied, slaked]

Moby Thesaurus II by Grady Ward, 1.0:

87 Moby Thesaurus words for "satisfied":
   accepting, allayed, assured, at ease, believing, certain, charmed,
   cloyed, comfortable, composed, confident, content, contented,
   convinced, cozy, crammed, delighted, devout, disgusted, dogmatic,
   doubtless, easy, easygoing, engorged, eupeptic, euphoric,
   exhilarated, faithful, favorably impressed with, fed-up, fideistic,
   full, full of, glad, gladsome, glutted, gorged, gratified, happy,
   impressed with, in clover, intrigued, jaded, of good comfort,
   overfed, overfull, overgorged, oversaturated, overstuffed,
   persuaded, pietistic, pious, pistic, pleased, pleased as Punch,
   pleased with, positive, reconciled, replete, resigned, sans souci,
   sated, satiated, saturated, secure, sick of, slaked, sold on,
   stuffed, supersaturated, sure, surfeited, taken with, thrilled,
   tickled, tickled pink, tickled to death, tired of, uncomplaining,
   under the impression, undoubtful, undoubting, unrepining,
   with a bellyful, with a snootful, with enough of, without care