[, ]a place through which you can go to reach another larger place （通往其他地区的）门户◆The port is an important gateway to/into southern Africa. 这个港口是进入非洲南部的重要门户。
[, ]a means of getting or achieving sth 方法；手段；途径◆A good education is the gateway to success. 良好的教育是通往成功之路。
() [] a device that is used to connect two computer networks together, especially a connection to the Internet 网关；网间连接设备