Software that mediates between an application program and a network. It manages the interaction between disparate applications across the heterogeneous computing platforms. The Object Request Broker (ORB), software that manages communication between objects, is an example of a middleware program.

Nearby terms:

Midas-WWWmiddle-endianmiddlewareMIDImid-level networkMIF

Try this search on Wikipedia, Wiktionary, Google, OneLook.