1. a person who talks excessively or constantly
Usage: informal

Examples

• My little sister is such a chatterbox that she never stops talking during car rides.
• The teacher had to remind the chatterbox in the back row to let others speak.
• He’s known as the office chatterbox because he always has something to say.
• Don’t sit next to Sarah if you want to concentrate – she’s a real chatterbox.
• The chatterbox at the party kept everyone entertained with her stories.
• Mom called me a chatterbox when I was young because I talked nonstop.