an opening in a hedge, fence, wall etc able to be closed by a barrier; a barrier used to control the passage of water, e.g. into or out of a dam
movable barrier at entrance
Cases of word usage
1) a curved part over a door, bridge, gate etc (arch)
2) an opening that can be closed by a gate (gateway)
3) a joint on which a lid, door or gate turns or swings; the central principle on which something depends (hinge)
4) a revolving gate that allows one person through at a time (turnstile)
