English Etymology From middle + -ware. Pronunciation Audio (UK):(file) Noun English Wikipedia has an article on:middlewareWikipedia middleware (usually uncountable, plural middlewares) (computing) Software that functions at an intermediate layer between applications and operating system or database management system, or between client and server. (computing) Networking software or 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. Derived terms message-oriented middleware Spanish Noun middleware m (plural middlewares) middlewareWikiwand - on Seamless Wikipedia browsing. On steroids.