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.
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   2. To pay to the extent of claims or deserts; to give what is
      due to; as, to satisfy a creditor.
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   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.
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   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.
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            The standing evidences of the truth of the gospel
            are in themselves most firm, solid, and satisfying.
                                                  --Atterbury.
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   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]