(1) In Open Systems Interconnection (OSI), the part of an application process that contains the OSI communications functions. Application entities can have more than one application association. See also application entity title.
(2) A logical grouping of application data into a unit with a discrete function, such as a case, contract, contact, or item. An application data entity is an application's way of organizing data in database tables into units or objects that correspond to business functions.
(3) An independent, self-contained, distinct set of software components that perform specific tasks.