babble

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To utter a meaningless confusion of words or sounds.
• intransitive verb To talk foolishly or idly; chatter.
• intransitive verb To make a continuous low, murmuring sound, as flowing water.
• intransitive verb To utter rapidly and indistinctly.
• intransitive verb To blurt out impulsively; disclose without careful consideration.
• noun Inarticulate or meaningless talk or sounds.
• noun Idle or foolish talk; chatter.
• noun A continuous low, murmuring sound, as of flowing water.

from The Century Dictionary.

• noun Inarticulate speech, such as that of an infant; idle talk; senseless prattle; murmur, as of a stream.
• noun Synonyms See prattle, n.
• To utter words imperfectly or indistinctly, as children do; prattle; jabber.
• To talk idly, irrationally, or thoughtlessly; chatter or prate heedlessly or mischievously.
• To make a continuous murmuring sound, as a stream; repeat a sound frequently and indistinctly.
• To utter incoherently or with meaningless iteration; repeat; prate.
• To utter foolishly or thoughtlessly; let out by babbling or prating: as, to babble a plot or a secret.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To utter in an indistinct or incoherent way; to repeat, as words, in a childish way without understanding.
• transitive verb To disclose by too free talk, as a secret.
• intransitive verb To utter words indistinctly or unintelligibly; to utter inarticulate sounds; as a child babbles.
• intransitive verb To talk incoherently; to utter unmeaning words.
• intransitive verb To talk much; to chatter; to prate.
• intransitive verb To make a continuous murmuring noise, as shallow water running over stones.
• noun Idle talk; senseless prattle; gabble; twaddle.
• noun Inarticulate speech; constant or confused murmur.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Idle talk; senseless prattle; gabble; twaddle.
• noun Inarticulate speech; constant or confused murmur.
• noun A sound of or alike that which of flowing water.
• verb intransitive To utter words indistinctly or unintelligibly; to utter inarticulate sounds; as, a child babbles.
• verb intransitive To talk incoherently; to utter unmeaning words.
• verb intransitive To talk much; to chatter; to prate.
• verb intransitive To make a continuous murmuring noise, as shallow water running over stones.
• verb transitive To utter in an indistinct or incoherent way; to repeat, as words, in a childish way without understanding.
• verb transitive To disclose by too free talk, as a secret.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb to talk foolishly
• verb utter meaningless sounds, like a baby, or utter in an incoherent way
• verb divulge confidential information or secrets
• noun gibberish resembling the sounds of a baby
• verb flow in an irregular current with a bubbling noise