Source : Webster's Revised Unabridged Dictionary (1913)

Violent \Vi"o*lent\, n.
   An assailant. [Obs.] --Dr. H. More.

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.

            Float upon a wild and violent sea.    --Shak.

            A violent cross wind from either coast. --Milton.

   2. Acting, characterized, or produced by unjust or improper
      force; outrageous; unauthorized; as, a violent attack on
      the right of free speech.

            To bring forth more violent deeds.    --Milton.

            Some violent hands were laid on Humphrey's life.
                                                  --Shak.

   3. Produced or effected by force; not spontaneous; unnatural;
      abnormal.

            These violent delights have violent ends. --Shak.

            No violent state can be perpetual.    --T. Burnet.

            Ease would recant Vows made in pain, as violent and
            void.                                 --Milton.

   {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.

   Syn: Fierce; vehement; outrageous; boisterous; turbulent;
        impetuous; passionate; severe; extreme.

Violent \Vi"o*lent\, v. t. [Cf. F. violenter.]
   To urge with violence. [Obs.] --Fuller.

Violent \Vi"o*lent\, v. i.
   To be violent; to act violently. [Obs.]

         The grief is fine, full, perfect, that I taste, And
         violenteth in a sense as strong As that which causeth
         it.                                      --Shak.

Source : WordNet®

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: {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}, {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}]