[uncountable] short message servicea system for sending short written messages from one mobile phone/cellphone to another（手机的）短信服务 [countable] a message sent by SMS （手机）短信，短消息◆I'm trying to send an SMS.我在发一条短信。 SYN text message  ➡  EMS , MMS ⨁to get / receive / send an SMS收到／接收／发送短信