Dictionary of Computer and Internet Terms: dock
dock
to anchor; to fix into position. Many application programs allow the user to move subordinate windows, such as toolboxes, from their original position to a new location at the top, bottom, or side of the main window, where they snap into place. This is called docking the toolbox.
The Windows taskbar (with "Start" and icons for open applications) is normally docked at the bottom of the screen, but by dragging it with the mouse, you can dock it at the top or either side instead.
