Source : Webster's Revised Unabridged Dictionary (1913)

Insult \In"sult\, n. [L. insultus, fr. insilire to leap upon:
   cf. F. insulte. See {Insult}, v. t.]
   1. The act of leaping on; onset; attack. [Obs.] --Dryden.

   2. Gross abuse offered to another, either by word or act; an
      act or speech of insolence or contempt; an affront; an
      indignity.

            The ruthless sneer that insult adds to grief.
                                                  --Savage.

   Syn: Affront; indignity; abuse; outrage; contumely. See
        {Affront}.

Insult \In*sult"\, v. t. [imp. & p. p. {Insulted}; p. pr. & vb.
   n. {Insulting}.] [F. insulter, L. insultare, freq. fr.
   insilire to leap into or upon; pref. in- in, on + salire to
   leap. See {Salient}.]
   1. To leap or trample upon; to make a sudden onset upon.
      [Obs.] --Shak.

   2. To treat with abuse, insolence, indignity, or contempt, by
      word or action; to abuse; as, to call a man a coward or a
      liar, or to sneer at him, is to insult him.

Insult \In*sult"\, v. i.
   1. To leap or jump.

            Give me thy knife, I will insult on him. --Shak.

            Like the frogs in the apologue, insulting upon their
            wooden king.                          --Jer. Taylor.

   2. To behave with insolence; to exult. [Archaic]

            The lion being dead, even hares insult. --Daniel.

            An unwillingness to insult over their helpless
            fatuity.                              --Landor.

Source : WordNet®

insult
     n 1: a rude expression intended to offend or hurt; "when a
          student made a stupid mistake he spared them no abuse";
          "they yelled insults at the visiting team" [syn: {abuse},
           {revilement}, {contumely}, {vilification}]
     2: a deliberately offensive act or something producing the
        effect of an affront; "turning his back on me was a
        deliberate insult" [syn: {affront}]
     v : treat, mention, or speak to rudely; "He insulted her with
         his rude remarks"; "the student who had betrayed his
         classmate was dissed by everyone" [syn: {diss}, {affront}]