1. talk in a friendly and informal way: "she chatted to her mother on the phone every day"
▪ exchange messages online in real time with one or more simultaneous users of a computer network:"I keep getting messages popping up on my screen from people wanting to chat"
noun
1. an informal conversation: "he dropped in for a chat"
▪ the online exchange of messages in real time with one or more simultaneous users of a computer network:"join me for a live online chat Wednesday at 1400 hours"