Source : Webster's Revised Unabridged Dictionary (1913)

Reprobate \Rep"ro*bate\ (-b?t), a. [L. reprobatus, p. p. of
   reprobare to disapprove, condemn. See {Reprieve}, {Reprove}.]
   1. Not enduring proof or trial; not of standard purity or
      fineness; disallowed; rejected. [Obs.]

            Reprobate silver shall men call them, because the
            Lord hath rejected them.              --Jer. vi. 30.

   2. Abandoned to punishment; hence, morally abandoned and
      lost; given up to vice; depraved.

            And strength, and art, are easily outdone By spirits
            reprobate.                            --Milton.

   3. Of or pertaining to one who is given up to wickedness; as,
      reprobate conduct. ``Reprobate desire.'' --Shak.

   Syn: Abandoned; vitiated; depraved; corrupt; wicked;
        profligate; base; vile. See {Abandoned}.

Reprobate \Rep"ro*bate\, n.
   One morally abandoned and lost.

         I acknowledge myself for a reprobate, a villain, a
         traitor to the king.                     --Sir W.
                                                  Raleigh.

Reprobate \Rep"ro*bate\ (-b?t), v. t. [imp. & p. p. {Reprobated}
   (-b?`t?d); p. pr. & vb. n. {Reprobating}.]
   1. To disapprove with detestation or marks of extreme
      dislike; to condemn as unworthy; to disallow; to reject.

            Such an answer as this is reprobated and disallowed
            of in law; I do not believe it, unless the deed
            appears.                              --Ayliffe.

            Every scheme, every person, recommended by one of
            them, was reprobated by the other.    --Macaulay.

   2. To abandon to punishment without hope of pardon.

   Syn: To condemn; reprehend; censure; disown; abandon; reject.

Source : WordNet®

reprobate
     adj : marked by immorality; deviating from what is considered
           right or proper or good; "depraved criminals"; "a
           perverted sense of loyalty"; "the reprobate conduct of
           a gambling aristocrat" [syn: {depraved}, {immoral}, {perverse},
            {perverted}]
     n : a person without moral scruples [syn: {miscreant}]
     v 1: reject (documents) as invalid [ant: {approbate}]
     2: abandon to eternal damnation; "God reprobated the
        unrepenting sinner"
     3: express strong disapproval of; "We condemn the racism in
        South Africa"; "These ideas were reprobated" [syn: {condemn},
         {decry}, {objurgate}, {excoriate}]