Dock is a word with multiple meanings depending on the context:
1. A structure extending alongshore or out from the shore into a body of water, to which boats may be moored.
2. The area of water between two piers or alongside a pier that receives a ship for loading, unloading, or repairs.
3. In computing, a graphical user interface element that provides quick access to frequently used applications.
4. To deduct from a person's wages or salary, especially as a penalty.
5. The solid bony part of a tail, especially of a dog or cat.