An "Adapter" is a device that allows different types of equipment or systems to work together. For example, a power adapter converts electrical current from a wall outlet to a form that can be used by a specific device, such as a laptop or smartphone. This ensures that devices can function properly even if their power requirements differ. In technology, an adapter can also refer to software that enables different applications to communicate. For instance, an API adapter allows a program to interact with another program or service, facilitating data exchange and functionality. This is essential for integrating various systems in today's interconnected digital environment.