Chat may refer to: Conversation * Casual conversation* * Online chat in an internet chat room or instant messaging system * Synchronous conferencing is the formal term for online chat technology * Bluechat with bluetooth devices * SMS chat with mobile * Chat is probably an abbreviated form of chatter, an imitative (echoic) word. It is also used in the term chit-chat. These terms are used to describe less consequential conversation. The following alternative derivation is probably fanciful. * The term "Chat" comes from the soldiers living in the trenchs in world war one. When soldiers wo...