a contextual menu that comes up when you click someting with the right mouse button
a Menu that is associated with another element
a menu that is invisible until
a menu that is shown after pressing a button on the object the menu is attached to
A Menu that provides no visual cue to its presence, but simply pops up when a user performs a particular action. Popup Menus are associated with a particular area of the workspace, such as the client area of an application, and a user must memorize where these areas are.
A list of actions which appears when you right click on the contents panel or a photo.