hypermedia Syllabification: (hy·per·me·di·a)Pronunciation: /ˌhīpərˈmēdēə/Definition of hypermedia noun Computing an extension to hypertext providing multimedia facilities, such as those handling sound and video. Origin: 1960s: from hyper- 'above, beyond' + media1hypermedia in other Oxford dictionaries Definition of hypermedia in the British & World English dictionary