Multimedia Messaging Service [] a system for sending pictures, sounds and short written messages from one mobile phone/cellphone to another多媒体短信服务；彩信◆You will need to subscribe to MMS.多媒体短信服务需申请才能开通。 [] a message sent by MMS通过多媒体短信服务发送的信息◆He sent me an MMS.他给我发来了一条多媒体短信。➡EMS , SMS