Transmission that combine media of communication (text and graphics and sound etc.) WordNet 3.0 & Open English WordNet

Multimedia is a form of communication that uses a combination of different content forms such as writing, audio, images, animations, or video into a single interactive presentation, in contrast to traditional mass media, such as printed material or audio recordings, which features little to no interaction between users. Wikipedia

Communications that incorporate multiple forms of information content and processing Wikipedia Disambiguation

Content that uses a combination of different content forms Wikidata

The combined use of sound, video, and text to present an idea. Wiktionary

The use of different media to convey information. Wiktionary (translation)