Wikipdia and Google are your friends when you're looking for information. Anyways, multimedia is combining pictures, text, sound, to produce something meaningful. Like music videos, progs which we see on TV, flash games and more - Thats's what I've read somewhere in the past.
media can be pictures, or sounds, graphics etc. Multi means more than one. So , multi media meaning more than one type of media usually combined, like pictures with sounds or music. That should explain it. What else do you need to know. Surely if you google that word you will find many web sites to help you on that topic.
Did you go through the wikipedia link that I had provided? Did you try to search in Google as suggested by others? It is difficult to keep telling "more" without knowing exactly what you want to know. One can write a full book on multimedia, perhaps! Google is your friend. Try to search and read yourself. Then if you have any specific question, you can always come back here.
To make a good multimedia project, it need experience project manager creative team, creative director, art director, graphic designer, photo editor, layout designer, video director, cameraman, post production video editor, 3D model artist, animator, sound engineer etc. So it's a team work not one man job, even a big worldwide multimedia company still outsource some of their works to specialist company or specialist freelancer for their multimedia project.
Just about all your posts are "What is the xxx. Please tell me about xxx". e.g what kind of features are in Firefox? What is GTA? How to play this game? Please tell me ,what is SIMS? Where we see SERP? Please tell me syntax of XHTML. You sound like a bot. "What is bot? Tell me more about bot" --- If you genuinely want to know about 3D modeling - it's basically the creation of virtual 3 dimensional objects using software. http://en.wikipedia.org/wiki/3D_model
where to make the rule posts? suggest me plz --- @ matthewrobertbell : Damn straight. The tolerance for garbage posts at DP has reached a new low. Nobody cares anymore. DP almost feels like it's been abandoned sometimes. + REP
As the terms states - multi=many media=communication. Any of many formats or mediums that help communicate a message. The typical formats include audio (mp3, wav, radio, etc.) video (television, movies, formats like .flv, mpeg, .avi etc), flash, flex, etc. etc.
Want information on 3D modeling, read some tutorials on it on my website. It's using programs such as 3DS Max, Cinema 4D, Blender 3D, AutoCAD, Bryce 3D, Maya, and Lightwave 3D. 3D modeling is the creation of 3 Dimensional objects.