1. (noun)chatter, chattering the rapid series of noises made by the parts of a machine Synonyms: chatter, cackle, yack, yak, yakety-yak, chattering
2. (noun)chatter, chattering the high-pitched continuing noise made by animals (birds or monkeys) Synonyms: chatter, cackle, yack, yak, yakety-yak, chattering