Media - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

The term media is an overloaded one when talking about the web; it takes on different meanings depending on the context.

Media (Audio-visual presentation): The term media (more accurately, multimedia) refers to audio, video, or combined audio-visual material such as music, recorded speech, movies, TV shows, or any other form of content that is presented over a period of time.
Media (CSS): In the context of CSS (Cascading Style Sheets), the term media refers to the destination to which the document is to be drawn by the rendering engine.