A "dockable keyboard" is a keyboard that can physically attach and detach from a device, like a laptop or tablet. It allows you to use a separate keyboard when needed and easily disconnect it when you're done. Full definition
Back in June of 2012 Asus unveiled the Transformer Book, a (at the time) unique Ivy Bridge Ultrabook convertible with dockable keyboard. (umpcportal.com)
You can think of it as Apples answer to the Microsoft Surface dockable keyboard. (goodereader.com)
One issue I want to raise is that the 11.6 - inch Clovertrail tablets with great dockable keyboards offer a near perfect combination for the traveling Windows user but it's not quite enough which, in other words, means they are sub-par. (umpcportal.com)