[C] (also ex`press train) fast train that stops at few stations 快车: the 8.00 am express to Edinburgh 早上8点开往爱丁堡的快车. 
[C] (US) company that delivers goods quickly 捷运公司. 
[U] service provided by the post office, railways, road services, etc for carrying goods quickly （邮局﹑ 铁路﹑ 公路等部门提供的）快邮, 速递, 速运: send goods by express 特快货运.