/ ˈgeɪtweɪ; NAmE / noun
1.
an opening in a wall or fence that can be closed by a gate :
They turned through the gateway on the left.
2.
[ usually sing. ] gateway to / into ... a place through which you can go to reach another larger place :
Perth, the gateway to Western Australia
3.
[ usually sing. ] gateway to sth a means of getting or achieving sth :
A good education is the gateway to success.
4.
( computing ) a device that connects two computer networks that cannot be connected in any other way