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1. A device to which a laptop or notebook computer can be attached to provide easy access to a power supply and a collection of peripherals that are typically connected to desktop computers.
2. A plug-in device with built-in speakers to which a portable media player can be attached, allowing audio files to be played out loud. In both senses also called dock.
(Electronics) a device used to connect one appliance to another, esp a portable computer and a desktop computer, to make use of its external power supply, monitor, and keyboard, esp to enable the transfer of data between the machines
a small desktop cabinet, usu. containing disk drives and ports for connection to peripherals, into which a laptop may be inserted so as to give it the functionality of a desktop computer.