A gate is a movable barrier, like a door, in a fence, wall, or other enclosure that allows people or vehicles to enter and leave. It can also refer to an entry point, such as at an airport or stadium.
“Gate” comes from Old English “geat,” meaning “opening or passage,” related to other Germanic words for doorways and gaps. It has long been tied to the idea of controlled entry and exit.
Gates are physical symbols of permission: the same fence can feel like a prison or a sanctuary depending on whether the gate is open. In computing, “logic gates” decide how information flows in a circuit, acting as tiny yes/no doorways for electrical signals.
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