Middleware Definition

Networking software/hardware that is deployed in the middle of, as opposed to serviced by, a packet network to enhance or provide some network function, such as caching, filtering, or firewall functionality.

Programs that serve as intermediaries and translators between two different computing platforms, perhaps between client workstations requesting data or programs, and servers that provide them. Middleware is used in cross-platform situations where the clients and servers run on different operating systems (OSs) or where different database file structures are used. See also client, database, OS, server, and software.