The Collaborative International Dictionary of English v.0.48:

Violent \Vi"o*lent\, a. [F., from L. violentus, from vis
   strength, force; probably akin to Gr. ? a muscle, strength.]
   1. Moving or acting with physical strength; urged or impelled
      with force; excited by strong feeling or passion;
      forcible; vehement; impetuous; fierce; furious; severe;
      as, a violent blow; the violent attack of a disease.
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            Float upon a wild and violent sea.    --Shak.
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            A violent cross wind from either coast. --Milton.
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   2. Acting, characterized, or produced by unjust or improper
      force; outrageous; unauthorized; as, a violent attack on
      the right of free speech.
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            To bring forth more violent deeds.    --Milton.
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            Some violent hands were laid on Humphrey's life.
                                                  --Shak.
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   3. Produced or effected by force; not spontaneous; unnatural;
      abnormal.
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            These violent delights have violent ends. --Shak.
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            No violent state can be perpetual.    --T. Burnet.
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            Ease would recant
            Vows made in pain, as violent and void. --Milton.
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   Violent presumption (Law), presumption of a fact that
      arises from proof of circumstances which necessarily
      attend such facts.

   Violent profits (Scots Law), rents or profits of an estate
      obtained by a tenant wrongfully holding over after
      warning. They are recoverable in a process of removing.
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   Syn: Fierce; vehement; outrageous; boisterous; turbulent;
        impetuous; passionate; severe; extreme.
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The Collaborative International Dictionary of English v.0.48:

Violent \Vi"o*lent\, n.
   An assailant. [Obs.] --Dr. H. More.
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The Collaborative International Dictionary of English v.0.48:

Violent \Vi"o*lent\, v. t. [Cf. F. violenter.]
   To urge with violence. [Obs.] --Fuller.
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The Collaborative International Dictionary of English v.0.48:

Violent \Vi"o*lent\, v. i.
   To be violent; to act violently. [Obs.]
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         The grief is fine, full, perfect, that I taste,
         And violenteth in a sense as strong
         As that which causeth it.                --Shak.
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WordNet (r) 3.0 (2006):

violent
    adj 1: acting with or marked by or resulting from great force or
           energy or emotional intensity; "a violent attack"; "a
           violent person"; "violent feelings"; "a violent rage";
           "felt a violent dislike" [ant: nonviolent]
    2: effected by force or injury rather than natural causes; "a
       violent death"
    3: (of colors or sounds) intensely vivid or loud; "a violent
       clash of colors"; "her dress was a violent red"; "a violent
       noise"; "wild colors"; "wild shouts" [syn: violent, wild]
    4: marked by extreme intensity of emotions or convictions;
       inclined to react violently; fervid; "fierce loyalty"; "in a
       tearing rage"; "vehement dislike"; "violent passions" [syn:
       fierce, tearing, vehement, violent, trigger-happy]
    5: characterized by violence or bloodshed; "writes of crimson
       deeds and barbaric days"- Andrea Parke; "fann'd by Conquest's
       crimson wing"- Thomas Gray; "convulsed with red rage"- Hudson
       Strode [syn: crimson, red, violent]