verb

1. To talk idly.

   “They knitted and chattered the whole time.”

2. Of teeth, machinery, etc, to make a noise by rapid collisions.

   “He was so cold that his teeth were chattering.”

3. To utter sounds which somewhat resemble language, but are inarticulate and indistinct.

Synonyms: clatter, knock, pink, chat, natter

noun

1. A noise that chatters.

2. Output fluctuation before reaching a stable condition.