|Origin:||From the sound|
1 also chatter away/on
to talk quickly in a friendly way without stopping, especially about things that are not serious or important:
She chattered away happily until she noticed I wasn't listening.
She chattered excitedly like a child.
We were chattering about the events of last night.
if birds or monkeys chatter, they make short high sounds
if your teeth are chattering, you are so cold or frightened that your teeth are knocking together
4 British English
educated middle-class people who like to discuss and have opinions about recent events and situations in society
—chatterer noun [countable]