Jisho

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Noun, Suru verb, Intransitive verb
1. chatNetworking, WWW
Wikipedia definition
2. Online chatOnline chat may refer to any kind of communication over the Internet, that offers a real-time direct transmission of text-based messages from sender to receiver, hence the delay for visual access to the sent message shall not hamper the flow of communications in any of the directions. Online chat may address point-to-point communications as well as multicast communications from one sender to many receivers and voice and video chat or may be a feature of a Web conferencing service.
Read “Online chat” on English Wikipedia
Read “チャット” on Japanese Wikipedia
Read “Online chat” on DBpedia

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