IM
noun /ˌaɪ ˈem/
/ˌaɪ ˈem/
(informal)- (also instant message)[countable, uncountable] a written message sent using a system on the internet that allows people to communicate with each other very quickly; the system of sending these messages
使用互联网上的系统发送的书面消息，使人们可以非常快速地相互交流；发送这些消息的系统 - (also instant messaging)[uncountable] a system on the internet that allows people to exchange written messages with each other very quickly
即时通信（互联网的快捷信息传递系统）