To talk rapidly or incessantly about trivial matters. The children chattered excitedly about their upcoming field trip.
To make a series of quick, high-pitched sounds, often as a result of cold or fear. Her teeth chattered as she stood shivering in the cold wind.
To vibrate or rattle, often producing a noise, as a machine or tool. The old typewriter chattered noisily as he typed his report.
(of birds or animals) To utter quick, repetitive, high-pitched sounds. The squirrels chattered angrily at the dog.