1. to talk rapidly and continuously about unimportant things
2. to make rapid clicking sounds

1. rapid continuous talk about unimportant things
2. a series of rapid clicking sounds

Examples

• The children chattered excitedly about their field trip.
• Her teeth began to chatter from the cold.
• The constant chatter in the cafeteria made it hard to concentrate.
• We could hear the chatter of typewriter keys from the office.
• Stop chattering and pay attention to the lesson.
• The monkeys’ chatter echoed through the jungle.
• The machine’s chatter indicated it needed repair.