Definition of "desktop"

The top surface of a desk.  examples

(computing) A desktop computer.  examples

(computing) A personal computer, as opposed to computers for business or server purposes.  examples

(computing, graphical user interface) The main graphical user interface of an operating system, usually displaying icons, windows and background wallpaper.  quotations  examples

(computing, graphical user interface, synecdoche) The wallpaper of this interface.  examples

Designed for use on a desk or similar piece of furniture.  examples

(computing) Of an application or website, designed to be run or viewed on a personal computer.  examples