prattle

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To talk or chatter idly or meaninglessly; babble or prate.
2. v. To utter or express by chattering foolishly or babbling.
3. n. Idle or meaningless chatter; babble.
4. n. A sound suggestive of such chattering; a babbling noise.

Century Dictionary and Cyclopedia

1. To talk artlessly and childishly; talk freely and idly, like a child; chatter; be loquacious; prate.
2. To force or effect by talking; bring or lead by prattling.
3. To utter in a babbling or childish manner.
4. n. Artless or childish talk; hence, puerile loquacity; twaddle.
5. n. Synonyms Prattle, Prating, Chat, Chatter, Babble, Tattle, Gossip, Gabble, Palaver, Twaddle, Gibberish, Jargon, Balderdash, Rigmarole. Prattle is generally harmless, if not pleasant, as the prattle of a child, or of a simple-minded person; prating now generally suggests the idea of boasting or talking above one's knowledge; chat is easy conversation upon light and agreeable subjects, as social chat beside an open fire; chatter is incessant or abundant talk, seeming rather foolish and sounding pretty much alike; babble or babbling is talk that is foolish to inaneness, as that of the drunkard (Prov. xxiii. 29); tattle is talk upon subjects that are petty, and especially such as breed scandal; gossip is the small talk of the neighborhood, especially upon personal matters, perhaps dealing with scandal; gabble is a contemptuous word, putting the talk upon the level of the sounds made by geese; palaver implies that the talk is either longer than is necessary, or wordy, or meant to deceive by flattery and plausibility; twaddle is mere silliness in talk; gibberish is mere sounds strung together without sense; jargon is talk that is unintelligible by the mingling of sounds or by the lack of meaning; balderdash is noisy nonsense; rigmarole is talk that has the form of sense, but is really incoherent, confused, or nonsensical.

Wiktionary

1. v. to talk incessantly and in a childish manner; to babble.
2. n. Silly, childish, talk; babble.

GNU Webster's 1913

1. v. To talk much and idly; to prate; hence, to talk lightly and artlessly, like a child; to utter child's talk.
2. v. To utter as prattle; to babble.
3. n. Trifling or childish tattle; empty talk; loquacity on trivial subjects; prate; babble.

WordNet 3.0

1. v. speak (about unimportant matters) rapidly and incessantly
2. n. idle or foolish and irrelevant talk