The Collaborative International Dictionary of English v.0.48:

Convict \Con*vict"\ (k[o^]n*v[i^]kt"), p. a. [L. convictus, p.
   p. of convincere to convict, prove. See Convice.]
   Proved or found guilty; convicted. [Obs.] --Shak.
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         Convict by flight, and rebel to all law. --Milton.
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The Collaborative International Dictionary of English v.0.48:

Convict \Con"vict\ (k[o^]n"v[i^]kt), n.
   1. A person proved guilty of a crime alleged against him; one
      legally convicted or sentenced to punishment for some
      crime.
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   2. A criminal sentenced to penal servitude.

   Syn: Malefactor; culprit; felon; criminal.
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The Collaborative International Dictionary of English v.0.48:

Convict \Con*vict"\ (k[o^]n*v[i^]kt"), v. t. [imp. & p. p.
   Convicted; p. pr. & vb. n. Convicting.]
   1. To prove or find guilty of an offense or crime charged; to
      pronounce guilty, as by legal decision, or by one's
      conscience.
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            He [Baxter] . . . had been convicted by a jury.
                                                  --Macaulay.
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            They which heard it, being convicted by their own
            conscience, went out one by one.      --John viii.
                                                  9.
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   2. To prove or show to be false; to confute; to refute.
      [Obs.] --Sir T. Browne.
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   3. To demonstrate by proof or evidence; to prove.
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            Imagining that these proofs will convict a
            testament, to have that in it which other men can
            nowhere by reading find.              --Hooker.
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   4. To defeat; to doom to destruction. [Obs.]
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            A whole armado of convicted sail.     --Shak.

   Syn: To confute; defect; convince; confound.
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WordNet (r) 3.0 (2006):

convict
    n 1: a person serving a sentence in a jail or prison [syn:
         convict, con, inmate, yard bird, yardbird]
    2: a person who has been convicted of a criminal offense
    v 1: find or declare guilty; "The man was convicted of fraud and
         sentenced" [ant: acquit, assoil, clear, discharge,
         exculpate, exonerate]