What is Application Sharing?

Legal Definition
Application sharing is an element of remote access, falling under the collaborative software umbrella, that enables two or more users to access a shared application or document from their respective computers simultaneously in real time. Generally, the shared application or document will be running on a host computer, and remote access to the shared content will be provided to other users by the host user. To transfer one application from one computer to another, The application must reside on only one of the machines connected with each other.
-- Wikipedia
Legal Definition
When a network allows more than two users to have access to programs.