The American Heritage® Dictionary of the English Language, 4th Edition
n. A computer-based information retrieval system that enables a user to gain or provide access to texts, audio and video recordings, photographs, and computer graphics related to a particular subject.
n. The use of text, data, graphics, audio and video as elements of an extended hypertext system in which all elements are linked so that the user can move among them at will
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a multimedia system in which related items of information are connected and can be presented together
Word Usage
"Or perphaps in hypermedia Times Square or in the TV showrooms of a Radio Shack."