Gate is a movable barrier, usually on hinges, closing an opening in a fence, wall, or other enclosure.
In modern usage, gate can also refer to:
1. The starting point in a race (starting gate)
2. A logical circuit in computing (logic gate)
3. Slang for a scandal (like Watergate)
4. Airport boarding area (departure gate)
5. In electronics, a terminal that controls the flow of current