chatter

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To talk rapidly, incessantly, and on trivial subjects; jabber.
2. v. To utter a rapid series of short, inarticulate, speechlike sounds: birds chattering in the trees.
3. v. To click quickly and repeatedly: Our teeth chattered from the cold.
4. v. To vibrate or rattle while in operation: A power drill will chatter if the bit is loose.
5. v. To utter in a rapid, usually thoughtless way: chattered a long reply.
6. n. Idle, trivial talk.
7. n. Communication, such as e-mail and cell phone calls, between people who are involved in terrorism or espionage, as monitored by a government agency.
8. n. The sharp, rapid sounds made by some birds and animals.
9. n. A series of quick rattling or clicking sounds.

Century Dictionary and Cyclopedia

1. To utter a succession of quick, shrill, inarticulate sounds, as a magpie or a monkey.
2. To make a rapid rattling noise, as the teeth, from cold or fright.
3. To talk thoughtlessly, idly, or rapidly; jabber; gabble.
4. To argue.
5. To jar, so as to form a series of nicks or notches, as a cutting-tool.
6. To utter as one who or that which chatters: as, to chatter nonsense.
7. n. succession of quick, shrill, inarticulate sounds, especially if discordant or jarring, like those uttered by a magpie or a monkey; rapid and imperfectly articulated utterance.
8. n. The noise made by the teeth striking together repeatedly and rapidly, as under the influence of cold or fright.
9. n. Idle or foolish talk.
10. n. Synonyms See prattle, n.

Wiktionary

1. n. talk, especially meaningless or unimportant talk
2. n. the sound of talking
3. n. the sound made by a magpie
4. n. an intermittent noise, as from vibration
5. n. in national security, the degree of communication between suspect groups and individuals, used to gauge the degree of expected terrorist activity.
6. v. intransitive To talk idly.
7. v. intransitive Of teeth, machinery, etc, to make a chattering noise.
8. n. one who chats
9. n. Internet a user of chat rooms

GNU Webster's 1913

1. v. To utter sounds which somewhat resemble language, but are inarticulate and indistinct.
2. v. To talk idly, carelessly, or with undue rapidity; to jabber; to prate.
3. v. To make a noise by rapid collisions.
4. v. To utter rapidly, idly, or indistinctly.
5. n. Sounds like those of a magpie or monkey; idle talk; rapid, thoughtless talk; jabber; prattle.
6. n. Noise made by collision of the teeth, as in shivering.

WordNet 3.0

1. v. click repeatedly or uncontrollably
2. n. noisy talk
3. v. cut unevenly with a chattering tool
4. v. speak (about unimportant matters) rapidly and incessantly
5. v. talk socially without exchanging too much information
6. n. the rapid series of noises made by the parts of a machine
7. n. the high-pitched continuing noise made by animals (birds or monkeys)
8. v. make noise as if chattering away