The hypermedia document presentation system that can be accessed over the Internet using software called a Web browser [San Diego State University]. A Web browser (also known as a Web client program) is software that allows users to access and view HTML documents (e.g., Netscape, Mosaic, Lynx, WinWeb, MacWeb) [San Diego State University]. (ichnet.org)

Saying World Wide Web is almost like saying Internet in that it means different things to different people. If you consider all the various information services unified by HTML documents and URL hyperlinks as a whole, that is the Web. (cs.rice.edu)

The name of the consortium that is steering standards development for the World Wide Web. (mavidesign.com)