CHATTER, verb intransitive [See Chat.] 1. To utter sounds rapidly and indistinctly, as a magpie, or a monkey. 2. To make a noise by collision of the teeth. We say, the teeth chatter when one is chilly and shivering. 3. To talk idly, carelessly or rapidly; to jabber. CHATTER, noun Sounds like those of a pie or monkey; idle talk.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI