The Collaborative International Dictionary of English v.0.48:

Implement \Im"ple*ment\, v. t.
   1. To accomplish; to fulfill. [R.]
      [1913 Webster]

            Revenge . . . executed and implemented by the hand
            of Vanbeest Brown.                    --Sir W.
                                                  Scott.
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   2. To provide with an implement or implements; to cause to be
      fulfilled, satisfied, or carried out, by means of an
      implement or implements.
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            The chief mechanical requisites of the barometer are
            implemented in such an instrument as the following.
                                                  --Nichol.
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   3. (Scots Law) To fulfill or perform, as a contract or an
      engagement.
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The Collaborative International Dictionary of English v.0.48:

Implement \Im"ple*ment\ ([i^]m"pl[-e]*ment), n. [LL. implementum
   accomplishment, fr. L. implere, impletum, to fill up, finish,
   complete; pref. im- in + plere to fill. The word was perh.
   confused with OF. empleier, emploier, to employ, F. employer,
   whence E. employ. See Plenty.]
   That which fulfills or supplies a want or use; esp., an
   instrument, tool, or utensil, as supplying a requisite to an
   end; as, the implements of trade, of husbandry, or of war.
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         Genius must have talent as its complement and
         implement.                               --Coleridge.
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WordNet (r) 3.0 (2006):

implement
    n 1: instrumentation (a piece of equipment or tool) used to
         effect an end
    v 1: apply in a manner consistent with its purpose or design;
         "implement a procedure"
    2: ensure observance of laws and rules; "Apply the rules to
       everyone"; [syn: enforce, implement, apply] [ant:
       exempt, free, relieve]
    3: pursue to a conclusion or bring to a successful issue; "Did
       he go through with the treatment?"; "He implemented a new
       economic plan"; "She followed up his recommendations with a
       written proposal" [syn: follow through, follow up,
       follow out, carry out, implement, put through, go
       through]