A "gateway" is a point of entry or exit that allows access to a particular area or system. In technology, it often refers to a device or software that connects different networks, enabling communication between them. For example, a router acts as a gateway between a home network and the internet. In a broader context, a gateway can also refer to a physical location, such as a city or port, that serves as an entry point for travelers or goods. These gateways facilitate trade and movement, playing a crucial role in connecting different regions and cultures.