Source : Webster's Revised Unabridged Dictionary (1913)

Babble \Bab"ble\, v. i. [imp. & p. p. {Babbled} (?);p. pr. & vb.
   n. {Babbling}.] [Cf.LG. babbeln, D. babbelen, G. bappeln,
   bappern, F. babiller, It. babbolare; prob. orig., to keep
   saying ba, imitative of a child learning to talk.]
   1. To utter words indistinctly or unintelligibly; to utter
      inarticulate sounds; as a child babbles.

   2. To talk incoherently; to utter unmeaning words.

   3. To talk much; to chatter; to prate.

   4. To make a continuous murmuring noise, as shallow water
      running over stones.

            In every babbling he finds a friend.  --Wordsworth.

   Note: Hounds are said to babble, or to be babbling, when they
         are too noisy after having found a good scent.

   Syn: To prate; prattle; chatter; gossip.

Source : WordNet®

babbling
     adj 1: talking idly or incoherently; "blithering (or blathering)
            idiot"; "jabbering children"; "gabbling housewives";
            "a babbling hospital inmate" [syn: {blathering}, {blithering},
             {jabbering}]
     2: continuous low murmuring sound; as especially of water; "a
        babbling brook"
     n : gibberish resembling the sounds of a baby [syn: {babble}, {lallation}]