The Collaborative International Dictionary of English v.0.48:

Corrupt \Cor*rupt"\ (k?r-r?pt"), v. i.
   1. To become putrid or tainted; to putrefy; to rot. --Bacon.
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   2. To become vitiated; to lose purity or goodness.
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The Collaborative International Dictionary of English v.0.48:

Corrupt \Cor*rupt"\, v. t. [imp. & p. p. Corrupted; p. pr. &
   vb. n. Corrupting.]
   1. To change from a sound to a putrid or putrescent state; to
      make putrid; to putrefy.
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   2. To change from good to bad; to vitiate; to deprave; to
      pervert; to debase; to defile.
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            Evil communications corrupt good manners. --1. Cor.
                                                  xv. 33.
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   3. To draw aside from the path of rectitude and duty; as, to
      corrupt a judge by a bribe.
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            Heaven is above all yet; there sits a Judge
            That no king can corrupt.             --Shak.
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   4. To debase or render impure by alterations or innovations;
      to falsify; as, to corrupt language; to corrupt the sacred
      text.
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            He that makes an ill use of it [language], though he
            does not corrupt the fountains of knowledge, . . .
            yet he stops the pines.               --Locke.
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   5. To waste, spoil, or consume; to make worthless.
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            Lay not up for yourselves treasures upon earth,
            where moth and rust doth corrupt.     --Matt. vi.
                                                  19.
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The Collaborative International Dictionary of English v.0.48:

Corrupt \Cor*rupt`\ (k?r-r?pt"), a. [L. corruptus, p. p. of
   corrumpere to corrupt; cor- + rumpere to break. See
   Rupture.]
   1. Changed from a sound to a putrid state; spoiled; tainted;
      vitiated; unsound.
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            Who with such corrupt and pestilent bread would feed
            them.                                 --Knolles.
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   2. Changed from a state of uprightness, correctness, truth,
      etc., to a worse state; vitiated; depraved; debased;
      perverted; as, corrupt language; corrupt judges.
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            At what ease
            Might corrupt minds procure knaves as corrupt
            To swear against you.                 --Shak.
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   3. Abounding in errors; not genuine or correct; as, the text
      of the manuscript is corrupt.
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WordNet (r) 3.0 (2006):

corrupt
    adj 1: lacking in integrity; "humanity they knew to be
           corrupt...from the day of Adam's creation"; "a corrupt
           and incompetent city government" [ant: incorrupt]
    2: not straight; dishonest or immoral or evasive [syn:
       crooked, corrupt] [ant: square, straight]
    3: containing errors or alterations; "a corrupt text"; "spoke a
       corrupted version of the language" [syn: corrupt,
       corrupted]
    4: touched by rot or decay; "tainted bacon"; "`corrupt' is
       archaic" [syn: corrupt, tainted]
    v 1: corrupt morally or by intemperance or sensuality; "debauch
         the young people with wine and women"; "Socrates was
         accused of corrupting young men"; "Do school counselors
         subvert young children?"; "corrupt the morals" [syn:
         corrupt, pervert, subvert, demoralize,
         demoralise, debauch, debase, profane, vitiate,
         deprave, misdirect]
    2: make illegal payments to in exchange for favors or influence;
       "This judge can be bought" [syn: bribe, corrupt, buy,
       grease one's palms]
    3: place under suspicion or cast doubt upon; "sully someone's
       reputation" [syn: defile, sully, corrupt, taint,
       cloud]
    4: alter from the original [syn: corrupt, spoil]