Hypermedia

Hypermedia is a term used as a logical extension of the term hypertext, in which audio, video, plain text, and non-linear hyperlinks intertwine to create a generally non-linear medium of information. This contrasts with multimedia, which, although often capable of random access in terms of the physical medium, is essentially linear in nature.

The World Wide Web is a classic of hypermedia, whereas a movie on a DVD is an example of standard multimedia. Of course, the lines between the two can (and often do) blur depending on how a particular technological medium is implemented.