Source : Webster's Revised Unabridged Dictionary (1913)

Rave \Rave\, n. [Prov. E. raves, or rathes, a frame laid on a
   wagon, for carrying hay, etc.]
   One of the upper side pieces of the frame of a wagon body or
   a sleigh.

Rave \Rave\, v. i. [imp. & p. p. {Raved}; p. pr. & vb. n.
   {Raving}.] [F. r[^e]ver to rave, to be delirious, to dream;
   perhaps fr. L. rabere to rave, rage, be mad or furious. Cf.
   {Rage}, {Reverie}.]
   1. To wander in mind or intellect; to be delirious; to talk
      or act irrationally; to be wild, furious, or raging, as a
      madman.

            In our madness evermore we rave.      --Chaucer.

            Have I not cause to rave and beat my breast?
                                                  --Addison.

            The mingled torrent of redcoats and tartans went
            raving down the valley to the gorge of Kiliecrankie.
                                                  --Macaulay.

   2. To rush wildly or furiously. --Spencer.

   3. To talk with unreasonable enthusiasm or excessive passion
      or excitement; -- followed by about, of, or on; as, he
      raved about her beauty.

            The hallowed scene Which others rave on, though they
            know it not.                          --Byron.

Rave \Rave\, v. t.
   To utter in madness or frenzy; to say wildly; as, to rave
   nonsense. --Young.

Source : WordNet®

rave
     n 1: a dance party that lasts all night and electronically
          synthesized music is played; "raves are very popular in
          Berlin"
     2: an extravagantly enthusiastic review; "he gave it a rave"

rave
     v 1: participate in an all-night techno dance party
     2: talk in a noisy, excited, or declamatory manner [syn: {rant},
         {mouth off}, {jabber}, {spout}, {rabbit on}]
     3: praise enthusiastically; "She raved about that new
        restaurant" [syn: {gush}]

Source : Free On-Line Dictionary of Computing

rave
     
        [WPI] 1. To persist in discussing a specific subject.
     
        2. To speak authoritatively on a subject about which one knows
        very little.
     
        3. To complain to a person who is not in a position to correct
        the difficulty.
     
        4. To purposely annoy another person verbally.
     
        5. To evangelise.  See {flame}.
     
        6. Also used to describe a less negative form of blather, such
        as friendly bullshitting.  "Rave" differs slightly from
        {flame} in that "rave" implies that it is the persistence or
        obliviousness of the person speaking that is annoying, while
        {flame} implies somewhat more strongly that the tone or
        content is offensive as well.
     
        [{Jargon File}]