multimedia : a technique (as the combining of sound, video, and text) for expressing ideas (as in communication, entertainment, or art) in which several media are employed ; also : something (as software) using or facilitating such a technique — Merriam-Webster See also OneLook
Multimedia is content that uses a combination of different content forms such as text, audio, images, animations, video and interactive content. Multimedia contrasts with media that use only rudimentary computer displays such as text-only or traditional forms of printed or hand-produced material.
Multimedia can be recorded and played, displayed, interacted with or accessed by information content processing devices, such as computerized and electronic devices, but can also be part of a live performance. Multimedia devices are electronic media devices used to store and experience multimedia content. Multimedia is distinguished from mixed media in fine art; for example, by including audio it has a broader scope. The term “rich media” is synonymous with interactive multimedia. — Wikipedia